A class of 30 students appeared in a test. The average score of 12 students is 80, and that of the rest is 70. What is the average score of the class?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 74.
According to the question,
Total score = (12 × 80) + (18 × 70) = 960 + 1260 = 2220
Average = = 74