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Mathematics 9 Online
OpenStudy (anonymous):

Find the mean of this set of numbers. 7, –9, 6, –10, –13, –5 A. –4 B. 4 C. –24 D. 7.7

OpenStudy (anonymous):

@SolomonZelman

OpenStudy (anonymous):

hi could you help?

OpenStudy (solomonzelman):

Yes, the mean is the \(\normalsize\color{blueviolet}{ \rm average }\).

OpenStudy (solomonzelman):

To find the mean, add all number together, and divide by `the number/amount of numbers` in the set:

OpenStudy (anonymous):

so would it be D.?

OpenStudy (solomonzelman):

D would be the sum of all the numbers. (like when you add all of them together)

OpenStudy (solomonzelman):

The mean/ the average: is the average number: it is: \(\LARGE\color{blue}{ \frac{\LARGE \rm sum~~of~~all~~numbers}{\LARGE \rm number~~of~~all~~numbers} }\)

OpenStudy (solomonzelman):

in this case it is: \(\LARGE\color{blue}{ \frac{\LARGE \rm (7) +(-9)+( 6)+(-10)+( -13)+(-5)}{\LARGE \rm6} }\)

OpenStudy (anonymous):

ok i will do that then tell u my answer

OpenStudy (solomonzelman):

sure

OpenStudy (anonymous):

i got -4

OpenStudy (solomonzelman):

yes, that is totally correct

OpenStudy (anonymous):

ok thanks again!

OpenStudy (solomonzelman):

yw

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