1.

Three years ago the average age of a and b was 18 years. With c joining them, the average becomes 22 years. How old is c now ?a. 24 years b. 27 years c. 28 years d. 30 years how to solve?

Answer»

3years ago

A+B /2 =18

A+B = 36 (substitute in below)

A+B+C/3 = 22

36+C= 66

C=30 -3 years

C present age is 27




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