Posted by **Mimi** on Monday, March 21, 2011 at 10:15pm.

A student earned scores of 85, 83, 90, 94, 88 and 84 on the first six tests in a biology class. What score is needed on the seventh test to produce an 86 average?

- Math -
**Damon**, Monday, March 21, 2011 at 10:38pm
(85+83+90+94+88+84+x)/7 = 86

- Math -
**Mimi**, Monday, March 21, 2011 at 10:43pm
Do I add them together, have the answer and then divide by 7 ?

- Math -
**Damon**, Monday, March 21, 2011 at 10:48pm
ok here

(524+x)/7 = 86

524+x = 602

x = 78

- Math -
**Mimi**, Monday, March 21, 2011 at 10:56pm
Thank you.

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