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# The probability of rain is for any given day next week. What

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GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
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]  30 Jul 2018, 10:46
Expert's post
00:00

Question Stats:

85% (00:23) correct 14% (00:36) wrong based on 14 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 [?]: 6 [0], given: 11

Re: The probability of rain is for any given day next week. What [#permalink]  05 Aug 2018, 21:30
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. $$\frac{2}{3}$$

GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 112

Kudos [?]: 1865 [0], given: 397

Re: The probability of rain is for any given day next week. What [#permalink]  07 Aug 2018, 06:11
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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Re: The probability of rain is for any given day next week. What   [#permalink] 07 Aug 2018, 06:11
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