Math, asked by shubhamgupta5581, 8 months ago

The arithmetic mean of 12 observation is 7.5 if the arithmetic mean of 7 of this observation is 6.5 the mean of the remaining observation is?a) 5.5 b) 8.5 c) 8.9 d) 9.2

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Answered by Fsg9

0

Answer: 8.9

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