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# If four numbers are randomly selected without replacement fr

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Director
Joined: 07 Jan 2018
Posts: 597
Followers: 7

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If four numbers are randomly selected without replacement fr [#permalink]  26 Jun 2018, 21:09
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Question Stats:

77% (00:31) correct 22% (00:44) wrong based on 9 sessions
If four numbers are randomly selected without replacement from set {1, 2, 3, 4}, what is the probability that the four numbers are selected in ascending order?

A 1/256
B 1/64
C 1/48
D 1/24
E 1/12
[Reveal] Spoiler: OA
Director
Joined: 20 Apr 2016
Posts: 817
WE: Engineering (Energy and Utilities)
Followers: 9

Kudos [?]: 588 [0], given: 113

Re: If four numbers are randomly selected without replacement fr [#permalink]  27 Jun 2018, 06:00
amorphous wrote:
If four numbers are randomly selected without replacement from set {1, 2, 3, 4}, what is the probability that the four numbers are selected in ascending order?

A 1/256
B 1/64
C 1/48
D 1/24
E 1/12

Since the numbers are selected randomly without replacement then;

Probability of selecting Four nos. in ascending order =$$\frac{1}{4} * \frac{1}{3} * \frac{1}{2} * \frac{1}{1}$$ = $$\frac{1}{24}$$
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Re: If four numbers are randomly selected without replacement fr   [#permalink] 27 Jun 2018, 06:00
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