Ten years ago, the average age of A and B was 20 years. The average age of A, B and C is 30 years today. How old will C be after 5 years?
Ten years ago, the average age of A and B was 20 years. The average age of A, B and C is 30 years today. How old will C be after 5 years?
Step 1: Find the sum of the current ages of A and B.
Ten years ago, sum of ages of A and B = 2 × 20 = 40
Current sum of ages of A and B = 40 + 10 + 10 = 60
Step 2: Find the current age of C.
Current sum of ages of A, B, and C = 3 × 30 = 90
Current age of C = 90 - 60 = 30
Step 3: Find the age of C after 5 years.
Age of C after 5 years = 30 + 5 = 35
Answer: (C) 35
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