A group of 30 students appeared in a test. The average score of 12 students is 62, and that of the rest is 76. What is the average score of the group?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 70.4.
Sum of marks = Average × Number of students
Total score of 12 students = 62 × 12 = 744
Total score of remaining 18 students = 76 × 18 = 1368
Total score of 30 students = 744 + 1368 = 2112
Average = 2112/30 = 70.4