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Retired Moderator Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
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The probability of rain is for any given day next week. What [#permalink]
Expert's post 00:00

Question Stats: 87% (00:23) correct 12% (01:06) wrong based on 32 sessions
The probability of rain is $$\frac{1}{6}$$ for any given day next week. What is the probability that it will rain on both Monday and Tuesday?

A. $$\frac{1}{36}$$
B. $$\frac{1}{12}$$
C. $$\frac{1}{6}$$
D. $$\frac{1}{3}$$
E. $$\frac{2}{3}$$
[Reveal] Spoiler: OA
Intern Joined: 21 Jun 2018
Posts: 35
Followers: 0

Kudos [?]: 7 , given: 11

Re: The probability of rain is for any given day next week. What [#permalink]
sandy wrote:
The probability of rain is $$\frac{1}{6}$$ for any given day next week. What is the probability that it will rain on both Monday and Tuesday?

A. $$\frac{1}{36}$$
B. $$\frac{1}{12}$$
C. $$\frac{1}{6}$$
D. $$\frac{1}{3}$$
E. $$\frac{2}{3}$$

Retired Moderator Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156 WE: Business Development (Energy and Utilities)
Followers: 171

Kudos [?]: 2922 , given: 394

Re: The probability of rain is for any given day next week. What [#permalink]
Expert's post
Explanation

For probability questions, always begin by separating out the probabilities of each individual event. Then, if all the events happen (an “and question”), multiply the probabilities
together. If only one of the multiple events happens (an “or question”), add the probabilities together.

In this case, there are two events: rain on Monday and rain on Tuesday. The question asks for the probability that it will rain on Monday and on Tuesday, so multiply the individual probabilities together:

$$\frac{1}{6}\times\frac{1}{6}$$.
_________________

Sandy
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Try our free Online GRE Test Re: The probability of rain is for any given day next week. What   [#permalink] 07 Aug 2018, 06:11
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