Class A has 320 students, 40% of whom did not pass. Class B has 240 students, 30% of whom did not pass. Find the overall pass percentage (approximate).

Correct answer: 64%

Solution

In Class A, 60% of 320 passed, i.e. 192. In Class B, 70% of 240 passed, i.e. 168. Total passed = 360 out of 560 students, so the overall pass percentage is about 64.29%, approximately 64%.

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