Izzy had an 82 and an 88 on his first two tests and believed that he did well enough on his final exam to keep his B average. H

Question

3 years ago

8

Izzy had an 82 and an 88 on his first two tests and believed that he did well enough on his final exam to keep his B average. H

owever, when he got his grade he received a D. He checked with his instructor and learned that the instructor had made a mistake by transposing the digits when he recorded the final exam grade. If Izzy's incorrect average (mean) for the class was 69, what was his correct final exam score?

Mathematics

1 answer:

Anastaziya [24] · Answer 1 · 2022-01-28T17:06:37+03:00

Answer:

73

Step-by-step explanation:

to find the mean you need to add up all grades and divide if by the number of terms you added

(82 + 88 + x) ÷ 3 = 69 (since we don't know the third grade let's call it x)

170 + x = 69 × 3

x = 37

if the digits transposed the the actual grade would be 73

Izzy had an 82 and an 88 on his first two tests and believed that he did well enough on his final exam to keep his B average.​ H

Izzy had an 82 and an 88 on his first two tests and believed that he did well enough on his final exam to keep his B average. H