Average weight of 15 persons is 30 kg. A new person whose weight is 78 kg joins the group. What will be the average weight of 16 persons?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 33 kg.
Total weight of the initial 15 persons = 15 × 30 = 450 kg
New total weight = 450 + 78 = 528 kg
New average weight = 528/16 = 33 kg