A school has only four classes that contain 10, 20, 30, and 40 students respectively. The pass percentage of these classes are 20%, 30%, 60%, and 100% respectively. Find the pass % of the entire school.
Answer: 66%
Explanation
The number of pass candidates are 2 + 6 + 18 + 40 = 66 out of total 100.
Hence, Pass percentage = 66%
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