2+2 boss
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answers:
Mathmom say:
Assuming that all students who failed exam the first time write it again a second time, this means that 100% - 62% = 38% write it a second time.
Percentage who are allowed to graduate
= 0.62 + 0.45(0.38)
= 0.791
= 79.1%
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Flany say: 4
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Chris say: 79%
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St N say: Since this is in percentages, work from there. On the first attempt 62 of every 100 pass. These students will not take the second test, so 45% of the remainder will pass. The remainder is 100-62, so 45% of 38 is the number to pass on the second attempt. Just chuck any fractional people out of the sample. Hope you can work out 45% of 38. The total of the two tests will be the passing percentage.
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Chewbacca say: 5
Acerto mizeravi
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Krishnamurthy say: 4
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wyatt say: 6?
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Guy say: not sure thats a very tricky one
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