Question

A4={x : x is a two digits number and sum of digit of x is 7}​

Answer 1

Answer:

A4 = { x:x is a two digit number and sum of digit of x is 7 }

A4 = { 16 , 25 , 34 , 43 , 52 , 61 , 70 }

Answer 2

Answer:

A4 = {25,52,34,43,61,16,70}