Question

nA= 18 ,n(AUB)=45 and nAnB=6 find nB​

Answer 1

Answer:

33

Step-by-step explanation:

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

=> 45 = 18 + n(B) - 6

=> n(B) = 33

Answer 2

Step-by-step explanation:

As per the formula:- n(AUB)=n(A)+n(B)-n(AnB).

1. 45=18+n(B)-6
2. 45=n(B)+12
3. 45-12=n(B)
4. 33=n(B)

Therefore, n(B)=33