Results 1 to 5 of 5

Thread: independent or dependent?

  1. #1
    Junior Member
    Joined
    Oct 2018
    From
    Iceland
    Posts
    33

    independent or dependent?

    1. Of 10 students in a classroom, 4 are taking only history, 3 are taking only math, and 3 are taking both history and math. If you select a student uniformly at random, the event of this student taking history and the event that this student taking math are:
    independent or dependent?-captura.jpg

    2.
    Two fair six-sided dice are rolled at the same time. The event that the first die is 1 and the event that two dice sum up to be 7 are
    Click image for larger version. 

Name:	Captura.JPG 
Views:	8 
Size:	10.3 KB 
ID:	38984
    Last edited by Amanda2018; Oct 5th 2018 at 01:58 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    20,044
    Thanks
    3173

    Re: independent or dependent?

    For (1) the crucial point is that there are 3 students taking both. What are your thoughts on (2)?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Oct 2018
    From
    Iceland
    Posts
    33

    Re: independent or dependent?

    I think:
    For (1) dependen
    For (2) independent
    how about your think?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Oct 2009
    From
    Brisbane
    Posts
    1,073
    Thanks
    317

    Re: independent or dependent?

    Quote Originally Posted by Amanda2018 View Post
    I think:
    For (1) dependen
    For (2) independent
    how about your think?
    If two events are INDEPENDENT then P(A and B) = P(A) x P(B).

    In Q1, what is P(H and M)? What is P(H)? Whats is P(M)? Does P(H and M) = P(H) x P(M) ?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Oct 2018
    From
    Iceland
    Posts
    33

    Re: independent or dependent?

    In Q1, P(H and M) = 3/10
    P(M) = 4/10
    P(H) = 3/10

    P(H and M) ≠ P(H) x P(M)

    pues, DEPENDEN
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Inconsistent, Independent , Dependent?
    Posted in the Algebra Forum
    Replies: 1
    Last Post: Dec 14th 2010, 05:48 PM
  2. Independent or dependent
    Posted in the Statistics Forum
    Replies: 1
    Last Post: Mar 10th 2010, 11:31 AM
  3. Linear dependent/independent
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: Oct 7th 2009, 07:51 PM
  4. Linearly independent/dependent
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: Jan 29th 2009, 01:12 AM
  5. Independent and Dependent Events
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: Feb 7th 2008, 09:22 PM

/mathhelpforum @mathhelpforum