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What is the probability that the sum of two dice will yield a 10 or lo

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What is the probability that the sum of two dice will yield a 10 or lo [#permalink]

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New post 10 Nov 2017, 16:00
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Question Stats:

57% (00:40) correct 43% (00:53) wrong based on 14 sessions

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What is the probability that the sum of two dice will yield a 10 or lower?

A. 34/36
B. 33/36
C. 32/36
D. 31/36
E. 30/36

Its the question from Manhattan GMAT Number Proporties page 65.

[Reveal] Spoiler:
Im not able to to understand ehy there are just three combination (5+6,6+5,6+6) and not 4 with the 6+6 again??

I´m such an idiot :)
[Reveal] Spoiler: OA

Last edited by Bunuel on 11 Nov 2017, 01:22, edited 1 time in total.
Renamed the topic and edited the question.

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Re: What is the probability that the sum of two dice will yield a 10 or lo [#permalink]

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New post 10 Nov 2017, 17:19
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Henni wrote:
Its the question from Manhattan GMAT Nzmber Proporties page 65.

What is the probability that the sum of two dice will yield a 10 or lower?

Im not able to to understand ehy there are just three combination (5+6,6+5,6+6) and not 4 with the 6+6 again??

I´m such an idiot :)

Dear Henni,

I'm happy to respond. :-)

My friend, think of physical dice. To make it easy to distinguish them, let's say we have one red die and one green die. What are the possibilities in which the sum is greater than 10?
(1) red = 5, green = 6
(2) red = 6, green = 5
(3) red = 6, green = 6

There's only one way to get 12--that's when both the red die and the green die show a 6. There's only one way for that to happen, whereas in the case of 11, there are two different things each die is doing to get those two results.

Does this make sense?
Mike :-)
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Mike McGarry
Magoosh Test Prep

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Kudos [?]: 8730 [1], given: 105

Re: What is the probability that the sum of two dice will yield a 10 or lo   [#permalink] 10 Nov 2017, 17:19
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