Multiple choice

5 years ago, the average age of A, B and C was 25 years and 7 years ago, the average age of B and C was 20 years. What is A's present age?

  1. 21 years

  2. 24 years

  3. 29 years

  4. 30 years

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

5 years ago, A+B+C=75. Presently A+B+C=90. 7 years ago, B+C=40. Presently B+C=54. Therefore A=(A+B+C)-(B+C)=90-54=36 years. Option E (None of these) is correct since 36 is not listed.

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