Question

Let X = {a,e,i,o,u} and Y = {a,g,o,f} , verify that n(A-B) = n(A) - n(A∩B)​

Answer 1

Step-by-step explanation:

Write the above sets in roster form

We have, A={1,2,3,4,5} and B={4,5,6,7}

From Ven-diagram, A−B={1,2,3} and B−A={6,7}

Clearly A−B



=B−A

solution

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Answer 2

Step-by-step explanation:

n(AUB)=n(A)+n(B)-n(ANB)_ _ _ _ _ _ _ (1)

given n (A) = 7

n (AUB) = 14

Substituting in 1

14 = 7 + 9 - in (ANB)

=> n (ANB) = 16-14=2