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siniylev [52]
4 years ago
11

What grade do you need on your next exam to have a 91 average on the five exams?

Mathematics
2 answers:
Hoochie [10]4 years ago
6 0

Answer:

you will have to have a 99% grade

Step-by-step explanation:

defon4 years ago
4 0

Answer:

D

Step-by-step explanation:

The average is calculated using

average = \frac{score}{count}

let x be the grade required on the fifth exam, then

\frac{99+86+76+95+x}{5} = 91

\frac{356+x}{5} = 91 ( multiply both sides by 5 )

356 + x = 455 ( subtract 356 from both sides )

x = 99 →  D

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