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rubaidi

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Posts posted by rubaidi

  1. 46 minutes ago, Thalia said:
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    I added up the number of students in each of the sports (30,40,25). That's 95. We know there's 23 students who don't play those sports so 67 remaining. That means there's a 28 student overlap. Adding up the given overlaps (15,10,8) gives you 33. So the overlap for those is 5. I subtracted from the appropriate sections of my diagram as I went.

    You are genius, could please upload your diagram again because I can't display picture. 

  2. 5 hours ago, rocdocmac said:

    Something is wrong with one or more of the numbers in the OP!

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    Football, baseball volleyball.jpg

     

    Excellent try, this formula can be used only EXACTLY number of FV ONLY , EXACTLY number of FB ONLY and EXACTLY number of VB ONLY.

    5 hours ago, Thalia said:

     

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    When it says a student plays 2 sports, that doesn't mean they don't play the 3rd sport. So I think when you subtract 2X, you're subtracting students already accounted for.

     

    Yes, that's right.

  3. There are 90 students at school, 30 students participate at football team, 40 students participate at Volleyball   team and 25 students participate at Basketball team.

    15 students are participating in football team & Volleyball team.

    10 Students are participating in football team & Basketball team.

    8 Students are participating in Volleyball team & Basketball team.

    23 Students not participating at any team, whereas there are students participate at three teams.

    How many students participating at three teams?

    How many students participating at Football team only?

    How many students participating at Volleyball team only?

    How many students participating at Basketball team only?

     

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