Question
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?Solution
Average of 12 students = 62
Total score of 12 students = 12 × 62 = 744
Remaining students = 30 - 12 = 18
Average of 18 students = 62
Total score of 18 students = 18 × 62 = 1116
Total score of all 30 students = 744 + 1116 = 1860
Average score of the group = 1860 ÷ 30 = 62
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