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# A restaurant offers a special that consists of an entrée, a main cours

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Math Expert
Joined: 02 Sep 2009
Posts: 53005
A restaurant offers a special that consists of an entrée, a main cours  [#permalink]

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17 Jan 2019, 23:54
00:00

Difficulty:

5% (low)

Question Stats:

96% (00:30) correct 4% (00:56) wrong based on 28 sessions

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A restaurant offers a special that consists of an entrée, a main course, and a dessert. If customers can choose from 4 entrées, 5 main courses, and 3 desserts, how many different meals can be chosen?

A 3
B 12
C 20
D 40
E 60

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Re: A restaurant offers a special that consists of an entrée, a main cours  [#permalink]

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18 Jan 2019, 04:34
Bunuel wrote:
A restaurant offers a special that consists of an entrée, a main course, and a dessert. If customers can choose from 4 entrées, 5 main courses, and 3 desserts, how many different meals can be chosen?

A 3
B 12
C 20
D 40
E 60

To select r out of n objects, we use nCr = n! / [r!*(n-r)!]
4C1 * 5C1 * 3C1 = 5*7*4 = 60

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Re: A restaurant offers a special that consists of an entrée, a main cours  [#permalink]

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18 Jan 2019, 06:35
Bunuel wrote:
A restaurant offers a special that consists of an entrée, a main course, and a dessert. If customers can choose from 4 entrées, 5 main courses, and 3 desserts, how many different meals can be chosen?

A 3
B 12
C 20
D 40
E 60

4c1*5c1*3c1
= 60
IMO E
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Re: A restaurant offers a special that consists of an entrée, a main cours   [#permalink] 18 Jan 2019, 06:35
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