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In a school 74% like cricket, 76% like football, 82% like tennis. Then all the three sports is liked by at least how many students???
Hii varsha !
It is based on a general formulae ...
n ( A U B U C ) = n ( A ) + n( B ) + n ( C ) - n(A int B ) - n ( A int C ) - n ( C int B ) + n ( A int B int C )
Now what we have to find out is....n ( A int B int C ) ...given n(A) = 74 n(B) = 76 and n(C) = 82
Also n ( A U B U C ) = 300 (considering A B C = 100 % )
So n ( A int B int C ) = 300 - ( 74 + 76 + 82 ) + n(A int B ) + n ( A int C ) + n ( C int B )
SO for case of atleast value....the unknown term can be taken as zero....
so atleast value of n ( A int B int C ) = 300 - 232 = 68 ans
With reagrds
Yagya
askiitians_expert
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