Question

if n(a ∪ b) =25 n(a ∩ b) = 7 and n(B) =10. find the value of x ang y?

Answer 1

Answer:

n(aUb) = n(a) + n(b) -n(a n b)

= 25 = n(a) +10-7

= n(a) = 22

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