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# A certain experiment has only three possible outcomes. The probabiliti

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Math Expert
Joined: 02 Sep 2009
Posts: 55274
A certain experiment has only three possible outcomes. The probabiliti  [#permalink]

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26 Nov 2018, 23:18
00:00

Difficulty:

25% (medium)

Question Stats:

74% (01:09) correct 26% (01:55) wrong based on 31 sessions

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A certain experiment has only three possible outcomes. The probabilities of the outcomes are p, r, and s. If r = 1 - 3p, what is s in terms of p ?

A. p
B. 2p
C. 3p
D. 1 - p
E. 1 - 2p

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Joined: 03 Mar 2017
Posts: 291
Re: A certain experiment has only three possible outcomes. The probabiliti  [#permalink]

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27 Nov 2018, 00:24
The sum of p+r+s=1

Given r=1-3p

Therefore, p+1-3p+s=1

1-2p+s=1

On solving s=2p. IMO B
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Re: A certain experiment has only three possible outcomes. The probabiliti   [#permalink] 27 Nov 2018, 00:24
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