The Group Leader of a group of 6 students reported that their average weight is 46 kg. When the members of the group were asked about their individual weights, 5 of them answered: 50 kg, 52 kg, 40 kg, 44 kg, 48 kg. The 6th member said, “I can’t recall my weight”. What is his weight?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 42 kg.
We know that,
Average = Sum of observations/Number of observations
So,
Total weight of all the members = 46 × 6 = 276 kg
Combined weight of the remaining 5 memebers = 50 + 52 + 40 + 44 + 48 = 234 kg
Weight of the 6th member = 276 - 234 = 42 kg