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Out of a classroom of 6 boys and 4 girls the teacher picks a president
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12 Oct 2021, 09:53
12 Oct 2021, 09:53
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Question Stats:
70% (00:59) correct
29% (02:06) wrong based on 17 sessions
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Out of a classroom of 6 boys and 4 girls the teacher picks a president for the student board, a vice president and a secretary. What is the probability that only girls will be elected?
A. 8/125.
B. 2/5.
C. 1/30.
D. 1/720.
E. 13/48.
A. 8/125.
B. 2/5.
C. 1/30.
D. 1/720.
E. 13/48.
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Re: Out of a classroom of 6 boys and 4 girls the teacher picks a president
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12 Oct 2021, 09:59
12 Oct 2021, 09:59
1
Carcass wrote:
Out of a classroom of 6 boys and 4 girls the teacher picks a president for the student board, a vice president and a secretary. What is the probability that only girls will be elected?
A. 8/125.
B. 2/5.
C. 1/30.
D. 1/720.
E. 13/48.
A. 8/125.
B. 2/5.
C. 1/30.
D. 1/720.
E. 13/48.
P(only girls get elected) = P(President is a girl AND VP is a girl AND Secretary is a girl)
= P(President is a girl) x P(VP is a girl) x P(Secretary is a girl)
= 4/10 x 3/9 x 2/8
= 1/30
Answer: C
gmatclubot
Re: Out of a classroom of 6 boys and 4 girls the teacher picks a president [#permalink]
12 Oct 2021, 09:59
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