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13 Jul 2018, 09:07
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
76% (01:31) correct
24%
(01:32)
wrong
based on 238
sessions
History
Date
Time
Result
Not Attempted Yet
Attachment:
gmatbusters (2).jpg [ 9.39 KiB | Viewed 3266 times ]
A) 18
B) 36
C) 41
D) 45
E) 72
13 Jul 2018, 09:20
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gmatbusters
This is nothing but choosing 2 out of the total...
choosing 2 out of 5 = \(5C2=5*2=10\)
so choosing 2 out of 9 = \(9C2=\frac{9*8}{2}=36\)
23 Jun 2022, 03:22
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Since we have to find out the total number of ways two numbers can be selected out of n, the answer will nC2.
Now, n here is 9.
Thus, 9C2 = 9*8/2 = 36.
Thus, the correct option is B.
Now, n here is 9.
Thus, 9C2 = 9*8/2 = 36.
Thus, the correct option is B.
