Find the mean of all the positive factors of $72$

16.25

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17.25

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18.25

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None of these

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Solution

The correct option is D $16.25$
Factors of $72$ are : $1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72$
$M e a n = \frac{S u m}{C o u n t}$

$M e a n = \frac{1 + 2 + 3 + 4 + 6 + 8 + 9 + 12 + 18 + 24 + 36 + 72}{12}$

$M e a n = \frac{195}{12}$

$M e a n = 16.25$

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Find the mean of all the positive factors of 72

The correct option is D 16.25Factors of 72 are : 1,2,3,4,6,8,9,12,18,24,36,72Mean=SumCountMean=1+2+3+4+6+8+9+12+18+24+36+7212Mean=19512Mean=16.25

Find the mean of all the positive factors of $72$

The correct option is D $16.25$
Factors of $72$ are : $1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72$
$M e a n = \frac{S u m}{C o u n t}$

$M e a n = \frac{1 + 2 + 3 + 4 + 6 + 8 + 9 + 12 + 18 + 24 + 36 + 72}{12}$

$M e a n = \frac{195}{12}$

$M e a n = 16.25$