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5 pairs of socks are randomly distributed in a bag. If you reach in an
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16 Nov 2021, 05:26
16 Nov 2021, 05:26
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Question Stats:
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33% (00:46) wrong based on 9 sessions
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5 pairs of socks are randomly distributed in a bag. If you reach in and select 2 socks, what is the probability that you are holding a matched pair?
A. 1/100
B. 1/90
C. 1/10
D. 1/9
E. 1/5
A. 1/100
B. 1/90
C. 1/10
D. 1/9
E. 1/5
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Re: 5 pairs of socks are randomly distributed in a bag. If you reach in an
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16 Nov 2021, 05:58
16 Nov 2021, 05:58
1
Carcass wrote:
5 pairs of socks are randomly distributed in a bag. If you reach in and select 2 socks, what is the probability that you are holding a matched pair?
A. 1/100
B. 1/90
C. 1/10
D. 1/9
E. 1/5
A. 1/100
B. 1/90
C. 1/10
D. 1/9
E. 1/5
P(matched pair) = P(1st sock is any sock AND 2nd sock matches 1st sock)
= P(1st sock is any sock) x P(2nd sock matches 1st sock)
= \(\frac{10}{10}\) x \(\frac{1}{9}\)
= \(\frac{1}{9}\)
Answer: D
gmatclubot
Re: 5 pairs of socks are randomly distributed in a bag. If you reach in an [#permalink]
16 Nov 2021, 05:58
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