Question

a and b be two sets and u be the universal set such that n (a)=25, n (b)=28 and n (u)=50. write the greatest value of n (aUb)​

Answer 1

Answer:

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Step-by-step explanation:

We need to find n(A∩B)n(A∩B)=n(U)−n(A∪B) ....(i)

Now n(A∪B)=n(A)+n(B)−n(A∩B)

n(A∪B)=400

Put in equation (i), we get

n(A∩B)=700−400=300