Posted by **wan** on Saturday, November 10, 2012 at 10:24am.

in a class of 38 children,19 play tennis, 21 play squash and 10 play neither sport. (1)how many children play both sports?(2)how many children play only tennis

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**Steve**, Saturday, November 10, 2012 at 10:48am
28 play some sport

19+21-both=28

both = 12

tennis only = 19-12 = 7

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**Joe**, Friday, December 7, 2012 at 4:06pm
Isn't 19 + 21 + 40 which is more than the amount of children in the class? Then you add 10 more that don't play it's 50. So how is the class total 38 as implied?

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**Valerie nolan **, Tuesday, May 6, 2014 at 2:43pm
Where did u get the 12 from

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**diana**, Tuesday, January 5, 2016 at 4:33pm
there are 4 green marbles,5 blue marbles,and 6 purples marble.

1. What the probability of picking a red marble, not replacing it, then picking a purple marble?

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