Question

12. If n(E)=50,n(M)=60,and
n(EnM)=40,find n(EuM).​

Answer 1

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see attached file for your answer

Answer 2

n(EuM)+ n(EnM)= n(E)+n(M)

n(EuM)= 50+60-40 = 70

n(EuM)=70