Question

the number of subset of set A is twice to the number of subsets of B. set B is larger than set C. Number of subsets of set B is 15 more than number of subsets of set C. then find the number of subsets of set A

Answer 1

let no. of subsets of B =x
given no. of subsets of A is twice that of B 
=> no. of subsets of A = 2x
give set B is larger than set C
and no. of subsets of set B is 15 more than that of C
let no. of subsets of C = y
=> y=x+15
(i had the same Q in my examination today n i attempted it till here i have no idea how much im gonna score but i wish it helps you) :)