5 years ago, the average age of A, B, C and D was 45 years. With E joining them now, the average age of all the five is 49 years. How old is E ?
- 40 years
- 45 years
- 25 years
- None
Explanation
Given:
- 5 years ago, average age of A, B, C, and D = 45 years
- So, total age of A, B, C, and D 5 years ago = 45 × 4 = 180 years
- Now, their total age = 180 + (5 × 4) = 200 years
- Current average of A, B, C, D, E = 49 years
- So, total age of all five = 49 × 5 = 245 years
Now, age of E = 245 − 200 = 45 years
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