Question

Find the cardinal number of the
If n(B) = 60, n(An B) = 11, and n(A U B) = 105, find n(A).
A. 58
O B. 56
C. 45
D. 54

Answer 1

Answer:

B

Step-by-step explanation:

n(A∪B)=n(A)+n(B)-n(A∩B)

105=n(A)+60-11

n(A)=105-60+11=56