Multiple choice

5 years ago ,the average age of P and Q was 15 years. The present average age of P,Q and R is 20 years.What will be R's age after 10 years?

  1. 35 years

  2. 40 years

  3. 30 years

  4. 50 years

  5. 25 years

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

5 years ago, average age of P and Q was 15, so their sum was 30. Present sum of P and Q = 30 + 10 = 40. Present average of P, Q, R is 20, so their sum = 60. Thus R's present age = 60 - 40 = 20. After 10 years, R will be 30.