Angela math test scores so far are as follows: 87, 96, 82, 77. What score must Angela make on the final test in order to have a test average of 88?

3 Answers

Let xx be the score of the final test then

(87+96+82+77+x)/5=88=>x=9887+96+82+77+x5=88x=98

Sep 16, 2015

I found 9898

Explanation:

Considering an average of nn scores:

(Sigma"scores")/n=(87+96+82+77+x)/5=88
you get:
342+x=5xx88
x=440-342=98

Sep 16, 2015

Angela must score 98 in her final test.

Explanation:

Let x represent the score that Angela gets on her final test.

The average of all 5 of the tests can be found by computing,

bar x=(87+96+82+77+x)/5=88

from this we just use algebra and solve for x.

(342+x)/5=88
x=(88xx5)-342
x=98

Hope it helps :)