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Jill has received 8 of her 12 evaluation scores. So far, Ji
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Updated on: 27 Dec 2018, 04:26
Updated on: 27 Dec 2018, 04:26
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Jill has received 8 of her 12 evaluation scores. So far, Jill’s average (arithmetic mean) is 3.75 out of a possible 5. If Jill needs an average of 4.0 points to get a promotion, which list of scores will allow Jill to receive her promotion?
Indicate all such sets.
❑ 3.0, 3.5, 4.75, 4.75
❑ 3.5, 4.75, 4.75, 5.0
❑ 3.25, 4.5, 4.75, 5.0
❑ 3.75, 4.5, 4.75, 5.0
Re: Jill has received 8 of her 12 evaluation scores. So far, Ji
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10 Oct 2017, 08:33
10 Oct 2017, 08:33
5
The mean of 8 grades being 3.75 permits us to compute the sum of those 8 grades as 8*3.75 = 30. Then, we can write an equation which gives us the sum of the last four grades, as \(\frac{30+x}{12} = 4\) from which we know x = 18, the sum of the last four grades.
Now we just have to check which choices sum to 18. B and D sum to 18, thus they are the answers!
Now we just have to check which choices sum to 18. B and D sum to 18, thus they are the answers!
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Re: Jill has received 8 of her 12 evaluation scores. So far, Ji
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24 Aug 2022, 22:21
24 Aug 2022, 22:21
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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