Question

n(A-B) equal to 25 + x n( B-A) equal to 2x n ( A intersection B) equal to 2x if n (A) = 2 n( B) then x is

Answer 1

Answer:

Correct option is

B

5

n(A−B)=n(A)−n(A∩B)

=n(A)−2x=25+x

⇒n(A)=25+3x

n(B−A)=n(B)−n(A∩B)

⇒n(B)=4x

n(A)=2(n(B))

⇒25+3x=8x

⇒x=5