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 picturesWe can select 3 pictures from 5 pictures in 5C3 ways
5C3 =
102) Veronica includes 4 of her picturesWe can select 4 pictures from 5 pictures in 5C4 ways
5C4 =
5ASIDE: Below, there's a video that shows you how to quickly calculate combinations (like 5C3) in your headTotal number of possibilities =
10 +
5= 15
= D
Cheers,
Brent
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