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If four numbers are randomly selected without replacement fr

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