Question

4. If (A U B) = 15, n(A) 10 and n(B) = 5 then find n(A n B)​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:n(A)= 15

n(A-B)=10

Thus, n(AUB)=n(A)+n(B)-n(A intersection B)

= 15+n(B) -n(A intersection B)

=15 +n(B)-5

=10+ n(B)

We need to know the value of n(B).