Question

Let S be {1,2,3,4,5,6,7,8,9,10}. Find the number of subsets of A of S such that x belongs to A and 2x belongs to S =>2S belings to A​

Answer 1

Answer:

25

Step-by-step explanation:

A={1,2,3,4,5}

number of subsets of A= 5^2=25