Question

Q.13. If A={x:x is a two digit number, the sum of whose digits is 12},
then n(A) is equal to: *​

Answer 1

Step-by-step explanation:

ANSWER

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

The elements of this set are 17,26,35,44,53,62,71 and 80 only.

Therefore, this set can be written in roster form as C=17,26,35,44,53,62,71,80.