Question

If A subset B and n(A) =20, n(B)=30, then find n(A intersection B)​

Answer 1

SOLUTION

GIVEN

A ⊂ B and n(A) = 20 , n(B) = 30

TO DETERMINE

n(A ∩ B)

EVALUATION

Here it is given that

A ⊂ B

Thus every element of A is an element of B

So A ∩ B = A

∴ n(A ∩ B) = n(A)

Hence n(A ∩ B) = n(A) = 20

FINAL ANSWER

n(A ∩ B) = 20

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Answer 2

Answer:

a=20 b=30 so, n(a) =20 and n(b)=30