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Re: If the probability that event S will not occur is 1 - y, then the prob [#permalink]
Expert Reply
Bunuel wrote:
If the probability that event S will not occur is 1 - y, then the probability that event S will occur is

A. y^2 − 1
B. y^2
C. y/2
D. y - 1
E. y



Since the probability that S will not occur is (1 - y), the probability that it will occur is 1 - (1 - y) = y.

Answer: E
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Re: If the probability that event S will not occur is 1 - y, then the prob [#permalink]
Top Contributor
If the probability that an event S occurs is given by P(S0, the the probability that the same event, denoted as P(S') = 1 - P(S).

Therefore P(S) + P(S') = 1

Here P(S') = 1 - y

P(S) + 1 - y = 1

P(S) = 1 - 1 + y = y


Option E


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Re: If the probability that event S will not occur is 1 - y, then the prob [#permalink]
Expert Reply
If the probability of an event to occur is 'y' , then the probability if the same event to not occur is '1-y'

Answer E
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Re: If the probability that event S will not occur is 1 - y, then the prob [#permalink]
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Re: If the probability that event S will not occur is 1 - y, then the prob [#permalink]
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