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A drawer contains 7 white shirts and 3 red shirts. What is the probabi
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02 Jul 2019, 04:32
02 Jul 2019, 04:32
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Difficulty:
5%
(low)
Question Stats:
89% (00:55) correct
11%
(01:15)
wrong
based on 47
sessions
A drawer contains 7 white shirts and 3 red shirts. What is the probability of picking a white shirt, followed by a red shirt if the first shirt is not put back in?
A. 7/10
B. 1/3
C. 7/30
D. 1/6
E. 1/30
A. 7/10
B. 1/3
C. 7/30
D. 1/6
E. 1/30
Re: A drawer contains 7 white shirts and 3 red shirts. What is the probabi
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02 Jul 2019, 04:39
02 Jul 2019, 04:39
Bunuel wrote:
A drawer contains 7 white shirts and 3 red shirts. What is the probability of picking a white shirt, followed by a red shirt if the first shirt is not put back in?
A. 7/10
B. 1/3
C. 7/30
D. 1/6
E. 1/30
A. 7/10
B. 1/3
C. 7/30
D. 1/6
E. 1/30
Probability = 7/10 * 3/9 = 7/30
IMO C
Re: A drawer contains 7 white shirts and 3 red shirts. What is the probabi
[#permalink]
02 Jul 2019, 05:34
02 Jul 2019, 05:34
Bunuel wrote:
A drawer contains 7 white shirts and 3 red shirts. What is the probability of picking a white shirt, followed by a red shirt if the first shirt is not put back in?
A. 7/10
B. 1/3
C. 7/30
D. 1/6
E. 1/30
A. 7/10
B. 1/3
C. 7/30
D. 1/6
E. 1/30
Prob of white shirt*Prob of red shirt = 7/10*3/9 (as 1 white shirt is removed) = 7/30 IMO C
