If n(A ∪ B ∪ = 100, n(A) = 4x, n(B) = 6x, n(= 5x, n(A ∩ B) = 20, n(B ∩ = 15, n(A ∩ = 25 and n(A ∩ B ∩ C)= 10 , then the value of x is
A. 10
B. 15
C. 25
D. 30
Answer:A
If n(A ∪ B ∪ = 100, n(A) = 4x, n(B) = 6x, n(= 5x, n(A ∩ B) = 20, n(B ∩ = 15, n(A ∩ = 25 and n(A ∩ B ∩ C)= 10 , then the value of x is
A. 10 B. 15 C. 25 D. 30