The average weight of a group of 20 women was calculated as 58.5 kg, and it was later discovered that the weight of one of the women was read as 35 kg, whereas her actual weight was 65 kg. What is the actual average weight of the group of 20 women?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 60 kg.
Total weight (incorrect) = 20 × 58.5 = 1170 kg
Correct total weight = 1170 − 35 + 65 = 1200 kg
Actual average = = 60 kg