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The average weight of 12 crewmen in a boat is increased by 1/3 kg, when one of the crewmen whose weight is 55 kg is replaced by a new man. What is the weight of that new man?
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- 58 kg
- 60 kg
- 57 kg
- 59 kg
- 58 kg
Correct Option: D
| Total increase in weight = 12 × | = 4 | |
| 3 |
Weight of the new man = Weight of the crewmen + Total increase in weight
∴ Weight of the new man = 55 + 4 = 59 kg
Second method to solve this question with the help of given formula :
| Here, N = 12, T = 55, t = | ||
| 3 |
Weight of new man = T + Nt
| Weight of the new man = 55 + 12 × | |
| 3 |
Weight of the new man = 55 + 4 = 59 kg.
