A school has 320 students in Class A and 240 students in Class B. If 40% of the students in Class A did not pass and 30% of the students in Class B did not pass, what is the overall passing percentage of the school (approximately)?

Correct answer: 64%

Solution

In Class A, 60% passed, so passed students = 60% of 320 = 192. In Class B, 70% passed, so passed students = 70% of 240 = 168. Total passed = 360 out of 560, which is about 64.3%, so the overall passing percentage is approximately 64%.

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