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If and are two sets such that and then is equal to
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By Expert Faculty of Sri Chaitanya
a
21
b
31
c
20
d
52
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Correct option is A
n(A~B)=n(A)−n(A∩B)⇒15=n(A)−16⇒n(A)=31n(A∪B)=n(A)+n(B)−n(A∩B)⇒36=31+n(B)−16⇒ n(B)=21.
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Set A and B have 3 and 6 elements respectively. What can be the minimum number of elements in
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