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Flor is choosing three of five colors of paint to use for her art

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by BTGModeratorVI » Mon Sep 14, 2020 8:34 am

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Flor is choosing three of five colors of paint to use for her art project at school. Two of the colors, Green and Yellow, cannot both be selected. How many different ways can Flor choose the colors for her project?

A. 7
B. 9
C. 10
D. 13
E. 17

Answer: A
Source: Princeton Review
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Source: — Problem Solving |

BTGModeratorVI wrote:
Mon Sep 14, 2020 8:34 am
Flor is choosing three of five colors of paint to use for her art project at school. Two of the colors, Green and Yellow, cannot both be selected. How many different ways can Flor choose the colors for her project?

A. 7
B. 9
C. 10
D. 13
E. 17

Answer: A
Source: Princeton Review
It's important to note that, when the answer choices are so small (as they are here), we should also consider the straightforward strategy of listing and counting

Let R, B, P, G and Y represent the colors Red, Blue, Purple, Green and Yellow respectively.

Now let's list the possible outcomes that meet all of the given conditions:
- RBP
- RBG
- RBY
- RPG
- RPY
- BPG
- BPY
Done!! So, there are 7 possible outcomes

Answer: A

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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