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If the probability of seeing an exponent question on a particular stan
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12 Oct 2021, 09:52
12 Oct 2021, 09:52
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Question Stats:
75% (01:02) correct
25% (01:18) wrong based on 8 sessions
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If the probability of seeing an exponent question on a particular standardized test is 5% for each question, what is the probability of seeing an exponent question in the first two questions?
A. 0.5
B. 0.0975
C. 0.0475
D. 0.025
E. 0.0125
A. 0.5
B. 0.0975
C. 0.0475
D. 0.025
E. 0.0125
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Re: If the probability of seeing an exponent question on a particular stan
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12 Oct 2021, 10:01
12 Oct 2021, 10:01
1
Carcass wrote:
If the probability of seeing an exponent question on a particular standardized test is 5% for each question, what is the probability of seeing an exponent question in the first two questions?
A. 0.5
B. 0.0975
C. 0.0475
D. 0.025
E. 0.0125
A. 0.5
B. 0.0975
C. 0.0475
D. 0.025
E. 0.0125
P(seeing an exponent question in the first two questions) = 1 - P(NOT seeing an exponent question in the first two questions)
P(NOT seeing an exponent question in the first two questions)
P(NOT seeing an exponent question in the first two questions) = P(1st Q is NOT an exponent question AND 2nd Q is NOT an exponent question)
= P(1st Q is NOT an exponent question) x P(2nd Q is NOT an exponent question)
= 0.95 x 0.95
= 0.9025
So, P(seeing an exponent question in the first two questions) = 1 - 0.9025
= 0.0975
Answer: B
gmatclubot
Re: If the probability of seeing an exponent question on a particular stan [#permalink]
12 Oct 2021, 10:01
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