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The mean of the 45 score
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01 Jun 2021, 00:10
01 Jun 2021, 00:10
Expert Reply
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Question Stats:
51% (01:20) correct
48% (01:48) wrong based on 39 sessions
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GRE The mean of the 45 scores.jpg [ 29.3 KiB | Viewed 3651 times ]
Quantity A |
Quantity B |
The mean of the 45 scores |
The median of the 45 score |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Re: The mean of the 45 score
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01 Jun 2021, 18:42
01 Jun 2021, 18:42
1
Weighted avg. of the mean of the group, both A and B
\(\frac{15}{45}\)*80 + \(\frac{30}{45}\)*74 = 75.92
Weighted avg. of median of the group, also including weights for each respective sub group, A and B.
\(\frac{15}{45}\)*84 + \(\frac{30}{45}\)*72 = 76
Answer should be B.
\(\frac{15}{45}\)*80 + \(\frac{30}{45}\)*74 = 75.92
Weighted avg. of median of the group, also including weights for each respective sub group, A and B.
\(\frac{15}{45}\)*84 + \(\frac{30}{45}\)*72 = 76
Answer should be B.
Re: The mean of the 45 score
[#permalink]
03 Jun 2021, 07:36
03 Jun 2021, 07:36
1
The answer should be D because no matter what the mean is, we don't have any information to determine the pro forma median.
