The individual weights (in kg) of six boys are 55, 56, 57, 60, 59 and 55. A new boy joins the group, and the mean weight of the group becomes 62 kg. Find the weight of the new boy (in kg).
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 92.
Total weight of 6 boys = 55 + 56 + 57 + 60 + 59 + 55 = 342
Total weight of 7 boys = 7 × 62 = 434
Weight of new boy = 434 - 342 = 92