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Isaya is deciding which two schools he will apply to this fall. If the

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Bunuel
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Isaya is deciding which two schools he will apply to this fall. If the [#permalink] New post   13 Dec 2016, 07:37
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A
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E

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Isaya is deciding which two schools he will apply to this fall. If the must choose from among the seven schools in his geographic region, how many different groups of schools could he apply to?

A. 2
B. 6
C. 12
D. 21
E. 42
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D
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Abhishek009
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Re: Isaya is deciding which two schools he will apply to this fall. If the [#permalink] New post   13 Dec 2016, 07:41
Bunuel wrote:
Isaya is deciding which two schools he will apply to this fall. If the must choose from among the seven schools in his geographic region, how many different groups of schools could he apply to?

A. 2
B. 6
C. 12
D. 21
E. 42

\(7C_2 = 21\)

Hence, answer will be (D)
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avaneeshvyas
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Re: Isaya is deciding which two schools he will apply to this fall. If the [#permalink] New post   15 Dec 2016, 21:20
I think it should be 42.

7C2 *2 ...... 2 being the order of choice between the two schools. Kindly let me know if my logic is flawed here.
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Re: Isaya is deciding which two schools he will apply to this fall. If the [#permalink] New post   21 Dec 2016, 10:32
Find the possible combinations: 2C7 = (7x6)/2! = 21
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Re: Isaya is deciding which two schools he will apply to this fall. If the [#permalink]
21 Dec 2016, 10:32
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