Exams › SSC CGL (Prelims) › General
The average score of 25 students in a test is 68. The top 5 scorers had an average of 80, and the lowest 5 had an average of 50. What is the average of the remaining 15 students?
- 70
- 68
- 72
- 66
Correct answer: 70
Solution
The total score of 25 students is $25 \times 68 = 1700$. The top 5 scored $5 \times 80 = 400$ and the lowest 5 scored $5 \times 50 = 250$, so the remaining 15 scored $1700 - 400 - 250 = 1050$. Their average is $1050/15 = 70$.
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