The mean of a set of eight number is 91. if one number is missing then the new mean is 88.
Find the mean of missing number??
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Sum/number =91
Sum/8=91
Sum=728
728-x/7=88
728-x=616
x=728-616
X=112
Sum/8=91
Sum=728
728-x/7=88
728-x=616
x=728-616
X=112
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