Question

3 years ago the average age of a and b was 18 years c joined them now the average become 22years .how old is c now

Answer 1

correct solution of the given question

Answer 2

Find the sum of the age of A and B 3 years ago:

Average = 18 years old

Total = 18 x 2 = 36 years

Find the sum of the age of A and B now:

Each one of them will have increased by 3 years

Total = 36 + 3 + 3 = 42 years

Find the sum of age of A, B and C now:

Average = 22 years old

Total = 22 x 3 = 66 years

Find the age of C:

C = 66 - 42 = 24 years old

Answer: C is 24 years old