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Rod's scores on 4 history tests are 88,96,98,and 90. What score does he need on the fifth test to have a mean score of 94 on all 5 tests? ----------------------------- Please help answer
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Rod's scores on 4 history tests are 88,96,98,and 90. What score does he need on the fifth test to have a mean score of 94 on all 5 tests?

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Please help answer

User Semih Korkmaz
by
6.1k points

2 Answers

2 votes
the answer is 98 because you add everything up and you divide.
User Akib
by
5.8k points
3 votes
(88+96+98+90+x)/5=94
Add all the numbers
(372+x)/5=94
Multiply both sides by 5
372+x=470
Subtract 372 from both sides
x=98

Double check:
88+96+98+90+98=470/5=94

Hope that helps

User AxelWass
by
6.3k points
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