Question

N(B)=40.A intersection B=20n(A U B) =35 find nA​

Answer 1

Answer:

Hence,

n(AUB) = n(U) - n(AUB)’

n(AUB) = 60 - 10

= 50

Now,

n(AUB) = n(A) + n(B) - n(A∩B)

so,

n(A∩B) = n(A) + n(B) - n(AUB)

= 35 + 24 - 50

= 9 is your answer

Explanation: