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January 29, 2015

January 29, 2015

Posted by **Amy~** on Sunday, September 19, 2010 at 10:27pm.

I thought 80+83+71+61+95 = 390 / 5 = 78

then I don't know what to do next.

Although I did do 78 +2x = 85

and I get 3.5 and the answer is supposed to be 85.

I was wondering what would be the equation?

- Math -
**TutorCat**, Sunday, September 19, 2010 at 11:47pmtreat them as two scores and calculate the mean:

(80+83+71+61+95+x+x)/7 = 80

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