A class of 30 students appeared in a test. The average score of 12 students is 62, and that of the rest is 74. What is the average score of the class?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 69.2.
12 → 62
18 → 74
Average of the class = 62 + [(74 - 62) × 18]/30 = 62 + 7.2
= 69.2