Question

three years ago the avaerage of a ,b,c was 27 years and that of b and c 5 years ago was 20 years .A present age is​

Answer 1

Step-by-step explanation:

sum of the age of a, b, and c was 27×3years=81 years before 3 years.

sum of the age of b and c was 20×2years=40 years before 5 years

sum of the age of b and c was (40+2+2)years=44years before 3 years

age if a was (81-44)year =37 years before 3 years

present age of A is (37+3)years=40 years