Out of a class of 200 people, 50 people's average marks is 40, and the remaining 150 people's average is 60. Find the people's weighted average.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 55.
By using the weighted average:
Weighted Average = (50 × 40 + 150 × 60)/ 200
⇒ (2000 + 9000)/ 20
⇒ 11000/200 = 55
Hence, people's weighted average is 55.