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# If a bag contains 18 yellow tiles and 22 black tiles, what i

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If a bag contains 18 yellow tiles and 22 black tiles, what i [#permalink]  16 Sep 2018, 11:34
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Question Stats:

100% (00:27) correct 0% (00:00) wrong based on 22 sessions

If a bag contains 18 yellow tiles and 22 black tiles, what is the probability that a tile selected at random from the bag will be yellow?

A. $$\frac{1}{10}$$

B. $$\frac{9}{20}$$

C. $$\frac{11}{20}$$

D. $$\frac{9}{11}$$

E. $$\frac{11}{9}$$
[Reveal] Spoiler: OA

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Re: If a bag contains 18 yellow tiles and 22 black tiles, what i [#permalink]  19 Sep 2018, 10:07
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Expert's post
Carcass wrote:
If a bag contains 18 yellow tiles and 22 black tiles, what is the probability that a tile selected at random from the bag will be yellow?

A. $$\frac{1}{10}$$

B. $$\frac{9}{20}$$

C. $$\frac{11}{20}$$

D. $$\frac{9}{11}$$

E. $$\frac{11}{9}$$

Number of YELLOW tiles in bag = 18
TOTAL number of tiles in bag = 18 + 22 = 40

P(selected tile is yellow) = (# of possible outcomes in which the selected tile is yellow)/(TOTAL # of possible outcomes)
= 18/40
= 9/20

Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.com

Re: If a bag contains 18 yellow tiles and 22 black tiles, what i   [#permalink] 19 Sep 2018, 10:07
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