Question

write in roster form
'set of prime no. s from 1 to 20'

Answer 1

2 3 5 7 11 13 17 19 are the prime no. btw 1 to 20

Answer 2

YOUR ANSWER..
Roster form is that form in which we write contents of the set.
{2,3,5,7,11,13,17,19}