The weight of a person was entered incorrectly as 83 kg instead of 63 kg. As a result, the average weight of a group of people increased by 500 gm. What is the total number of people in the group?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 40
Given that
The weight of a person was entered incorrectly as 83 kg instead of 63 kg,
As a result, the average weight of a group of people increased by 500 gm or 0.5 kg
According to the question
The change in weight = 63 - 83 = - 20 kg (' - ' represent the decrement of the weight)
Hence, the number of people in the group = 20/0.5 = 40