step by step direction to find the missing number using the given values and mean

For each data set, use the given values and the mean to find the missing number:          25,13,26,30,14,25, mean is 21.
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1 Answer

25+13+26+30+14+25=133 (sum of 6 given data values). If the missing number is n then 133+n is the sum of 7 data values.

The mean of the resulting 7 data values is 21, so:

(133+n)/7=21, 133+n=7×21=147, n=147-133=14.

by Top Rated User (1.1m points)

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