here's the question:
a teacher records the test marks of 25 students and calculates the class mean to be 72. jean-pierre finds out that his mark of 86 was recorded incorrectly as 36. what will the corrected class mean be?
i checked the answer key and it says the new class mean is 74, but i dont get how they got 74, so can you show me how you got 74, or you can show me how you did it and what you get so i'll know what went wrong and how i should do it. thank you!!! (and by the way, if you dont know what i'm talking about, then get lost)
2006-12-28
16:58:02
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8 answers
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why me?
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Mathematics