Multiple choice

Five years ago, the average age of P, Q, R and S was 45 years. Now T has also joined them and the average of all the five is 49 years. How old is T?

  1. 25 years

  2. 40 years

  3. 45 years

  4. 64 years
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Five years ago, the sum of ages of P, Q, R, and S was 45 * 4 = 180. Now, their sum is 180 + (5 * 4) = 200. With T, the sum of all five is 49 * 5 = 245. Thus, T's age is 245 - 200 = 45.

AI explanation

Five years ago, the total age of P, Q, R and S was 4 times 45, giving 180 years. Their present total age is 180 plus 4 times 5, which equals 200 years. With T included, the present total age of all five people is 5 times 49, which equals 245 years. T's age is the difference between 245 and 200, which is 45 years.

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