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Math Help - Number of students in Class

  1. #1
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    Number of students in Class

    Delete please . . . .
    Last edited by Aladdin; March 6th 2010 at 10:35 AM.
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  2. #2
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    Quote Originally Posted by Aladdin View Post
    Help Help Help

    The teacher has told the principle that there is :

    Half of the students listen to the lesson
    1/4 (quarter) of the students looks like they are listining to the lesson
    1/7 of the students likes to talk when I'm giving the lesson.
    The three left students are sleeping while I'm giving the question.

    Can someone please give me the Final Answer , please
    hi Aladdin,

    if we can assume that the students who "look like' they are listening are in fact
    not listening and those who are talking are also not listening and do not look like they are listening (each group is seperate)

    then, if x is the total number of students

    x\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{7}\right)+  3=x
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