Processing math: 100%
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Find the Mean 81 , 83 , 69 , 71 , 74 , 67 , 85 , 74 , 73 , 68 , 73 , 78 , 80 , 89 , 75

81 , 83 , 69 , 71 , 74 , 67 , 85 , 74 , 73 , 68 , 73 , 78 , 80 , 89 , 75

Step 1
The mean of a set of numbers is the sum divided by the number of terms.
81+83+69+71+74+67+85+74+73+68+73+78+80+89+7515

Step 2
Simplify the numerator.

Add 81 and 83.
164+69+71+74+67+85+74+73+68+73+78+80+89+7515
Add 164 and 69.
233+71+74+67+85+74+73+68+73+78+80+89+7515
Add 233 and 71.
304+74+67+85+74+73+68+73+78+80+89+7515
Add 304 and 74.
378+67+85+74+73+68+73+78+80+89+7515
Add 378 and 67.
445+85+74+73+68+73+78+80+89+7515
Add 445 and 85.
530+74+73+68+73+78+80+89+7515
Add 530 and 74.
604+73+68+73+78+80+89+7515
Add 604 and 73.
677+68+73+78+80+89+7515
Add 677 and 68.
745+73+78+80+89+7515
Add 745 and 73.
818+78+80+89+7515
Add 818 and 78.
896+80+89+7515
Add 896 and 80.
976+89+7515
Add 976 and 89.
1065+7515
Add 1065 and 75.
114015
114015

Step 3
Divide 1140 by 15.
76