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If you roll one fair six-sided die, what is the probability that the

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Math Expert
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If you roll one fair six-sided die, what is the probability that the  [#permalink]

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New post 18 Jun 2019, 00:00
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A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

65% (01:04) correct 35% (00:45) wrong based on 31 sessions

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Re: If you roll one fair six-sided die, what is the probability that the  [#permalink]

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New post 18 Jun 2019, 00:10
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Bunuel wrote:
If you roll one fair six-sided die, what is the probability that the number is even or less than 4?

(A) 1/6
(B) 1/3
(C) 2/ 3
(D) 3/4
(E) 5/6


It is more of Set theory question.

Number is even = 2,4,6
Number less than 4=1,2,3
So Numbers that satisfy the criteria (Union of the two sets)=1,2,3,4,6
So Probability=5/6

Alternatively: 1-prob(Not even and greater than 4)=1-1/6=5/6
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Re: If you roll one fair six-sided die, what is the probability that the  [#permalink]

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New post 18 Jun 2019, 01:53
Bunuel wrote:
If you roll one fair six-sided die, what is the probability that the number is even or less than 4?

(A) 1/6
(B) 1/3
(C) 2/ 3
(D) 3/4
(E) 5/6


even - 2,4,6 ; 1/2
<4; 1,2,3 ; 2 is repeated ; 2/6 ; 1/3
total 1/2+1/3 ; 5/6
IMO E
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Re: If you roll one fair six-sided die, what is the probability that the   [#permalink] 18 Jun 2019, 01:53
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