Question

19. The overall age of X and Y is 12 year greater than the overall age of Y and Z. Z is how many
decades younger that X?
[A] 10
[C] Z is elder than X
[B]
[D]
12
None of these​

Answer 1

Z is 1.2 decades younger than x

Explanation:

given ,

The overall age of X and Y is 12 year greater than the overall age of Y and Z. Z is how many

decades younger that X

let X , y and z represent the age of X , y and z respectively ,

thus ,

X + y = ( y + z ) ,

= X = z + 12

= z = X - 12

therefore z is 12 is younger than x since 10 years = 1 decades