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The table below shows how many students surveyed in a college school c
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20 Apr 2022, 01:00
20 Apr 2022, 01:00
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40% (02:59) correct
60% (02:09) wrong based on 5 sessions
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The table below shows how many students surveyed in a college school class have taken the GRE 0-3 times. Two students absent on the date of the survey were later added to the results (not shown below), making the average equal to the median. How many times did the two absent students take the GRE?
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Part of the project: Skill Builder Project for a Q170
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GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials for a TOP Quant Score - Q170!!! (2021)
GRE Geometry Formulas for a Q170
GRE - Math Book
The table below shows how many students surveyed in a college school c
[#permalink]
28 Apr 2022, 03:43
28 Apr 2022, 03:43
Expert Reply
The table below shows how many students surveyed in a college school c
[#permalink]
02 Nov 2022, 01:58
02 Nov 2022, 01:58
1
Initial median = 2, since the 23 numbers are 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3
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Since 0 and 1 total only 7 students, and 3 already has 8 students so 2 should be in the middle of both
The initial mean is (1*0 + 1*6 + 2*8 + 3*8) / (1+6+8+8) = 46/23 = 2 which is the same as the median already
if you add 2 students, the new mean would be (46 + new scores ) / (23 + 2) = 2
new scores = 2 * (23 + 2) - 46
new scores = 4
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Since 0 and 1 total only 7 students, and 3 already has 8 students so 2 should be in the middle of both
The initial mean is (1*0 + 1*6 + 2*8 + 3*8) / (1+6+8+8) = 46/23 = 2 which is the same as the median already
if you add 2 students, the new mean would be (46 + new scores ) / (23 + 2) = 2
new scores = 2 * (23 + 2) - 46
new scores = 4
