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A college student can select one out of eight optional subjects from

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Math Expert
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A college student can select one out of eight optional subjects from  [#permalink]

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New post 02 Oct 2018, 01:48
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

90% (01:15) correct 10% (01:47) wrong based on 60 sessions

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Senior Manager
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Location: United States
Concentration: Marketing, Technology
GMAT 1: 630 Q44 V33
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WE: Marketing (Telecommunications)
A college student can select one out of eight optional subjects from  [#permalink]

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New post 05 Oct 2018, 18:27
To choose 1 from 8 = 8!/(7!*1!)=8
To choose 2 from 10 = 10!/(2!*8!)=45

Total number of combinations =8*45=360. Answer D.
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Re: A college student can select one out of eight optional subjects from  [#permalink]

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New post 05 Oct 2018, 23:50
Bunuel wrote:
A college student can select one out of eight optional subjects from group one and two out of ten optional subjects from group two. If no subject is same in the groups, how many different sets of three subjects are there to select?

(A) 53
(B) 120
(C) 190
(D) 360
(E) 408


Number of ways he can select 1 subject out of 8 = 8 ways
Number of ways he can select 2 subjects out of 10 = \(10c2\) ways = 45
different sets of three subjects = 8*45 = 360
D
GMAT Club Bot
Re: A college student can select one out of eight optional subjects from   [#permalink] 05 Oct 2018, 23:50
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A college student can select one out of eight optional subjects from

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