Multiple choice

Three years ago, the average age of A, B and C was 29 years. If the average age of B and C, 5 years ago, was 23 years, then what is the present age (in years) of A?

  1. 49

  2. 40

  3. 46

  4. 50
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let present ages be A, B, C. Three years ago: A+B+C = 3×29 = 87, so present A+B+C = 87+9 = 96. Five years ago: B+C = 2×23 = 46, so present B+C = 46+10 = 56. Therefore A = 96-56 = 40 years.

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