Question

)
(0
In the given figure, if n(A) = 30, U
n(AUB) = 60, n(C) = 10 and
n(
A B ) = 5, then find n(B).
(a) 35
(b) 20
(c) 30
(d)10​

Answer 1

Answer:

(a)35

Step-by-step explanation:

n(A) = 30, n(A U B) = 60 & n(A n B) = 5

we know that,

n(A U B) = n (A) + n(B) - n(A n B)

n(B) = n(A U B) + n(A n B) - n(A)

n(B) = 60 + 5 - 30

n(B) = 35