A group of 30 students appeared in a test. The average score of 12 students is 62, and that of the rest is 62. What is the average score of the group?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 62.
We know that,
Average = Sum of observations/Number of observations
Now,
The average score of 12 students is 62
Sum of 12 students = 12 × 62 = 744
Sum of 18 students = 18 × 62 = 1116
Thus,
Average score = (744 + 1116)/30
⇒ 1860/30 = 62