student was asked to find the arthmetic mean of the numbers
3,11,7,9,15,13,8,19,17,21,14 and x. He found the mean be 12. What should be the
number in place of x?
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(3 + 11 + 7 + 9 + 15 + 13 + 8 + 19 + 17 + 21 + 14 + x) / 12 = 12. or 137 + x = 144 or x = 144 - 137 = 7. Answer: Arithmetic mean is sum of the numbers divided by the numbers.
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Answer:
very off for to Cricinfo Geoff Geoff from
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