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Math Help - Combinations.

  1. #1
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    Combinations.

    Hi

    please solve these two problems for me , these are in my math assignments so if don't give it to my teacher by tomorrow i'll be in a lotta trouble, I've been thinking about this for too long and I coudn't solve it please include the way you solve these.

    In a group of 8 people , 6 can speak english , 5 can speak mandarian. how many ways to select 4 people from that group so that two of them can be translators for english and other two can be translators for mandarian ?


    3 teachers are assigned to teach for 6 different classes . in how many ways can the teacher be assigned if
    each of them is assigned for two classes

    one is assigned for one class one is assigned for two classes and one is assined for three classes




    Thank you very much
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  2. #2
    MHF Contributor Unknown008's Avatar
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    No we won't. This is not a homework service site. Post what you got so far, what you tried and what you don't understand.
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  3. #3
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    If I could understand something I wouldn't bother posting it in a forum , and if the teacher could teach well I'd definitely understand the term. Regardless of what it is whether homework or something else I need to learn to solve it so if this is a real math forum please help me figure this out.
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  4. #4
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    You wouldn't have been given these questions if you had not done some previous work with similar problems. You should have class notes and a text book to refer to, regardless of how "well" your teacher teaches...

    You should refer to the rules of this site before posting, in particular Rules 6 and 11. http://www.mathhelpforum.com/math-he...hp?do=vsarules


    Q1 hint: Start by drawing a Venn Diagram.
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  5. #5
    MHF Contributor Unknown008's Avatar
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    I would be glad to help, but there are also rules on the forum I have to abide by, especially when it concerns assignments:

    6. Do not cheat. Teachers expect questions that form part of an assessment that contributes towards the final grade of a student to be the work of that student and not the work of others. For that reason, MHF policy is to not knowingly help with such questions. If a question presents in such a way as to suggest that it falls in this category, a Moderator will Close the thread (with an explanation as to why the thread was closed). The original poster can always send a pm to the Moderator to discuss the situation but if the Moderator is unconvinced, then the thread will remain closed. When a Moderator is certain that a particular member is attempting to cheat, that member will be banned and the offending thread removed. Where possible, the institute at which the member studies at will also be notified and a copy of the thread provided. This may sound harsh but the fact is that MHF places a high premium on academic honesty and integrity.

    11. Show some effort.
    If you want help with a question it is expected that you will show some effort. Effort might include showing your working, taking the time to learn how to typeset equations using latex (there is an entire subforum devoted to this), formatting your question so that it is more easily understood, using effective post titles and posting in the appropriate subforum, making a genuine attempt to understand the help that is given before asking for more help and learning from previous questions asked. Moderators reserve the right to Close threads in cases where the member is not making a genuine effort (particularly if the member is spamming the forums with multiple questions of exactly the same type). It should also be remembered that all contributors to MHF are unpaid volunteers and are under no obligation to answer a question.
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    Thank you guys very much , you thought me one best thing instead which may come very useful for me in the future and that is , it is better to lie sometimes than saying something honestly , yes you are right I should have asked the question in an other way , without the word assignment , teacher , etc... . To not violate the terms and conditions of a website.

    I'm a pharmacist, imagine if you seriously needed help and I wouldn't give you the right drug due to some rules , how would you feel ?

    I won't come back , so dont bother to answer back , but thank you very much indeed law abiding users
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  7. #7
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    In otherwords, everyone will be glad to help you do it yourself but not do it for you. And to help you we need to know exactly what you do understand about it and where you have difficulty.

    In a group of 8 people , 6 can speak english , 5 can speak mandarian. how many ways to select 4 people from that group so that two of them can be translators for english and other two can be translators for mandarian ?
    It has already been suggested that you draw a "Venn diagram". Do you know what that is? Draw two overlapping circles labeled "English" and "Mandarin". How many people speak both English and Mandarin and so fit into the overlap of the two circles?

    3 teachers are assigned to teach for 6 different classes . in how many ways can the teacher be assigned if
    each of them is assigned for two classes
    The fact that 2*3= 6 is important here!

    one is assigned for one class one is assigned for two classes and one is assined for three classes
    How many different ways can one of the three teachers be assigned to teach one of the six classes? Once that has been done, how many different ways can one of the remaining two teachers be assigned to two of the remaining five classes?

    Does your text book have anything about "permutations" and "combinations" in it?
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  8. #8
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    Quote Originally Posted by skywalker View Post
    Thank you guys very much , you thought me one best thing instead which may come very useful for me in the future and that is , it is better to lie sometimes than saying something honestly , yes you are right I should have asked the question in an other way , without the word assignment , teacher , etc... . To not violate the terms and conditions of a website.
    Contrary to popular belief the people who respond on this website are NOT stupid. If you had done that, the first response would have been "what have you done on this problem, yourself?"

    I'm a pharmacist, imagine if you seriously needed help and I wouldn't give you the right drug due to some rules , how would you feel ?
    You mean if some one really needed a hit of morphine but didn't have a prescription, you would give it to him? I am sorry to hear that you are a pharmacist- that really scares me.

    I won't come back , so dont bother to answer back , but thank you very much indeed law abiding users
    Have a nice life. But don't think that would prevent me having the last word!
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    Quote Originally Posted by HallsofIvy View Post
    You mean if some one really needed a hit of morphine but didn't have a prescription, you would give it to him? I am sorry to hear that you are a pharmacist- that really scares me.
    I know it is irrelevant in this forum but , in case someone really needs a hit of morphine , if I don't give it to him he will probably suffer to death , ( in terms of morphine and if that guys is not an addict ), you have mentioned morphine unintentionally but this drug saves lives , if someone who has been shot by a pistol come to my store and asks for help I definitely forget about rules. You can feel sorry for me and be a law abiding person but I use my logic instead of sticking to rules.
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  10. #10
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    Quote Originally Posted by skywalker View Post
    please solve these two problems for me , these are in my math assignments so if don't give it to my teacher by tomorrow i'll be in a lotta trouble......
    ...and you're a pharmacist ?
    Well, if you can give us your teacher's email, we could email him/her the solutions on your behalf; how's that?
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  11. #11
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    Quote Originally Posted by skywalker View Post
    I know it is irrelevant in this forum but , in case someone really needs a hit of morphine , if I don't give it to him he will probably suffer to death , ( in terms of morphine and if that guys is not an addict ), you have mentioned morphine unintentionally but this drug saves lives , if someone who has been shot by a pistol come to my store and asks for help I definitely forget about rules. You can feel sorry for me and be a law abiding person but I use my logic instead of sticking to rules.
    No, I did not mention morphine unintentionally. I know that morphine can reduce pain enormously. I doubt that anyone has ever died simply from pain- although they might well die if an untrained person were to give them a shot of morphine. You are a pharmacist? Then presumably you were trained in exactly how much to give a person so hopefully that is not a problem. And, as a pharmacist, you understand that if something did go wrong, that person, or his survivors, could sue you for millions.

    If a person were shot by a gun then I hope you would
    1) stop the bleeding
    2) call an ambulance
    3) call the police.

    But then what are you going to tell the paramedics (who will need to tell the police) about the morphine? In fact, I would suggest that if you really are a pharmacist, it is not a good idea to state on a public forum that you would dispense drugs without a prescription.

    Oh, and exactly how much danger are you in of dieing because someone would not do your homework for you?

    And, surely it would have taken less to to show what you do know about these problems and made some effort than to go through all of this.
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  12. #12
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    Quote Originally Posted by skywalker View Post
    Thank you guys very much , you thought me one best thing instead which may come very useful for me in the future and that is , it is better to lie sometimes than saying something honestly , yes you are right I should have asked the question in an other way , without the word assignment , teacher , etc... . To not violate the terms and conditions of a website.

    I'm a pharmacist, imagine if you seriously needed help and I wouldn't give you the right drug due to some rules , how would you feel ?

    I won't come back , so dont bother to answer back , but thank you very much indeed law abiding users
    In about every univeristy or college, I know of Calc 1 is a pre-req to even getting into a pharmacy program and some have you take Calc 2. If you are a pharmacist, you should be able to handle this level math or at bare min have been able to read the chapter and post something.

    Also, if you are cheating in school, isn't that a huge integrity issue? Should you really handle drugs?
    Last edited by dwsmith; January 25th 2011 at 12:20 PM.
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  13. #13
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    Quote Originally Posted by skywalker View Post
    Thank you guys very much , you thought me one best thing instead which may come very useful for me in the future and that is , it is better to lie sometimes than saying something honestly , yes you are right I should have asked the question in an other way , without the word assignment , teacher , etc... . To not violate the terms and conditions of a website.

    I'm a pharmacist, imagine if you seriously needed help and I wouldn't give you the right drug due to some rules , how would you feel ?

    I won't come back , so dont bother to answer back , but thank you very much indeed law abiding users
    You are probably studying to be a pharmacist (since mathematics is done in the first year of most pharmacy courses and covers things like what you have posted) as opposed to actually being a pharamicist. I assume at some stage you will be required to attend classes that cover your duty of care and legal responsibilities as a pharmacist. If you graduate from this course I hope for your sake that your views will be different to those you currently display (or you will most likely be banned from pharmacy at best and end up in jail at worst).

    I support every member in this thread who has requested that you show some effort and state where you are stuck.

    For better or for worse, this assignment question is obviously being used in part to determine your suitability in progressing further in your studies (not whether we will progress).

    Thread closed.
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