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04 May 2019, 02:44
Kudos
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E
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Difficulty:
45%
(medium)
Question Stats:
55% (01:28) correct
45%
(01:25)
wrong
based on 153
sessions
History
Date
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Not Attempted Yet
There are 5 employees in a team and all of them do not have equal salary. This year all of them get raise in their salary.
Is the standard deviation of salaries of 5 employees after receiving raises greater than the previous standard deviation of their old salaries before raise?
1) 2 of those 5 employees got a raise of 20% each
2) 3 of those 5 employees got a raise of 5% each
Source: www.GMATinsight.com
Is the standard deviation of salaries of 5 employees after receiving raises greater than the previous standard deviation of their old salaries before raise?
1) 2 of those 5 employees got a raise of 20% each
2) 3 of those 5 employees got a raise of 5% each
Source: www.GMATinsight.com
Archit3110
04 May 2019, 09:08
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GMATinsight
giving a try
since salaries are different for all so let it be 1,2,3,4,5
so avg= 3 and SD is 1 along mean for all
#1
2 of those 5 employees got a raise of 20% each
questions says This year all of them get raise in their salary
value for other 3 employee not given ; insufficient
#2
again same reason ; value of other 2 employee increase not given; insufficient
from1 &2
No info whose salary is increasing and by what %
IMO e;
09 Jul 2023, 02:13
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