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To apply for the position of photographer at a local magazine, Veronic [#permalink]

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06 Jul 2016, 06:13

3

00:00

A

B

C

D

E

Difficulty:

15% (low)

Question Stats:

77% (00:48) correct 23% (01:15) wrong based on 128 sessions

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To apply for the position of photographer at a local magazine, Veronica needs to include three or four of her pictures in an envelope accompanying her application. If she has pre-selected five photos representative of her work, how many choices does she have to provide the photos for the magazine?

Re: To apply for the position of photographer at a local magazine, Veronic [#permalink]

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15 Nov 2017, 12:26

Top Contributor

AnishG wrote:

To apply for the position of photographer at a local magazine, Veronica needs to include three or four of her pictures in an envelope accompanying her application. If she has pre-selected five photos representative of her work, how many choices does she have to provide the photos for the magazine?

(A) 5 (B) 10 (C) 12 (D) 15 (E) 50

Since the order in which we select the pictures does not matter, we can use combinations.

We must consider two possible cases: 1) Veronica includes 3 of her pictures We can select 3 pictures from 5 pictures in 5C3 ways 5C3 = 10

2) Veronica includes 4 of her pictures We can select 4 pictures from 5 pictures in 5C4 ways 5C4 = 5

ASIDE: Below, there's a video that shows you how to quickly calculate combinations (like 5C3) in your head

Total number of possibilities = 10 + 5 = 15 = D

Cheers, Brent

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Re: To apply for the position of photographer at a local magazine, Veronic
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15 Nov 2017, 12:26