SOLUTION: Here is another one
1. Brook has scored a 65, 72, 74, 84 and 94 on previous tests, what does she need to score to receive an 80 average?
Thank you in advance
Algebra.Com
Question 853309: Here is another one
1. Brook has scored a 65, 72, 74, 84 and 94 on previous tests, what does she need to score to receive an 80 average?
Thank you in advance
Answer by Seutip(231) (Show Source): You can put this solution on YOUR website!
Mean Average is sum divided by the count.
Let x - be the score she needs to get 80.
Therefore,
Then multiple both sides by 6
Therefore to get a mean average of 80, Brook must get a score of 91!
Hope that helps, follow me on twitter @seutip and also n instagram.
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