Question

If n (AUB)=70,n(A)37,n(B)=52, Find AUB (a)19. (b)20. (c)21. (d)24​

Answer 1

Correct Question :- If n (AUB)=70, n(A)37, n(B) = 52, Find n (A∩B) = ?

(a) 19.

(b) 20.

(c) 21.

(d) 24

Solution :-

we know that,

• n (AUB) = n(A) + n(B) - n (A∩B) .

given that,

→ n (AUB)=70

→ n(A) = 37

→ n(B) = 52

putting all three values in above told formula we get,

→ 70 = 37 + 52 - n (A∩B)

→ n (A∩B) = 37 + 52 - 70

→ n (A∩B) = 89 - 70

→ n (A∩B) = 19 (b) (Ans.)

Learn more :-

Q.no.6. The set of all positive integers less than 0 is: *

an infinite set

an empty set

a singleton set

{0}

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