CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

A and B are joined sets.If n(AB)=25+x, n(BA)=2x,  n(AB)=2x and n(A) = 2[n(B)], then x = ____.


  1. 4

  2. 5

  3. 6

  4. 7


Solution

The correct option is B

5



n(AB)=25+x, n(BA)=2x

n(AB)=2x

n(A)=n(AB)+n(AB)

       =25+x+2x=25+3x

n(B)=n(BA)+n(AB)

      =2x+2x=4x

 n(A)=2n(B)25+3x=2(4x)

5x=25x=5

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image