in a certain school 40% of the pupils play basketball , 25% play volleyball , and 10% play basketball and volleyball . what percentage of the pupils in the school play neither play basketball nor volleyball . display with venn diagram

Let pupils playing basket ball = A= 40%
Pupils playing volleyball = B= 25 %
Pupils playing both basketball and volleyball = AB=10%
We know that , 
n(AB)=n(A)+n(B)-n(AB)Putting value we get, n(AB)=40+25-10=55 %So percentage of the pupils playing neither basketball nor volleyball=n(AB)'=U-n(AB)'=100-55 =45%

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