Question

write the following sets in roster form :
c={X:X is a two digit natural number such that the sum of its digits is 8}​

Answer 1

c = {x : x is a two digit natural number such that the sum of its digits is 8}​

We have to find the 2 digit numbers whose digits have a sum of 8 .

Possible numbers are : 17 , 26 , 35 , 44 , 53 , 62 , 71 , 80 .

In roster form :

c = { 17 , 26 , 35 , 44 , 53 , 62 , 71 , 80 }