Question

find n(A union B) if n(A intersection B')=12 ,n(B intersection A')=13 and n(A intersection B)=5​

Answer 1

Answer:

n(a+b) n(a×b)= 12 ,n(b×a)= 13, n(a ×b)

= n²(a²+b²) = 12 and n²(a²+b²)

Step-by-step explanation:

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Answer 2

n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

Given n(A)=7

n(B)=9

n(A∪B)=14

Substituting in 1

14=7+9−n(A∩B)

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