`G= {x:x` is two digit number sum of whose digits is `4}`

A_(4)={x:x is a two digit natural number sum of whose digit is 8}

Number of 7 digit numbers the sum of whose digits is 61 is

Find the number of eight-digit numbers the sum of whose digits is 4.

Describe the following sets in Roster form: {x : x is a two digit number such that the sum of digits is 8} .

Describe the following sets in Roster form: {x : x is a two digit number such that the sum of digits is 8 } .

Write the set B = {X: X is a two digit numbers sych that the sum of its digits is 7}

How many different seven digit numbers are there the sum of whose digits is even ?