Question

Let U be the universal set containing 700 elements. If A and B are subsets of U such

that n(A)=200, n(B)=300 and n(An B)=100 then find n(A' n B).​

Answer 1

Answer:

Given, It should be n(A∪B)

n(A)=200 n(B)=300 n(A∩B)=100

Then n(A∪B)=n(A)+n(B)−n(A∩B)

n(A∩B)=200+300−100

=500−100

=400

Step-by-step explanation:

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