The average of the five numbers is 65 + 64 + 81 + 74 + 67 = 351/5 = 70.2.
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67.6363
find varience fo rthis numbers 71, 67, 70, 59, 71, 68, 67, 71, 80, 68, 74, 69, 72, 68.
74 * 65 = 4550 + 260 = 4810
65, 66 67 68 and 69 can all be numbers to be rounded to 70.
Add the seven numbers up then divide the answer by that 7 So 78+65=143 72+60+73=205 86+74=160 Total = 508 508 / 7 = 72.571