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If n is to be selected at random from set S, what is the probability

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If n is to be selected at random from set S, what is the probability  [#permalink]

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New post 19 Jan 2018, 11:00
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Re: If n is to be selected at random from set S, what is the probability  [#permalink]

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New post 19 Jan 2018, 11:09
Bunuel wrote:
If n is to be selected at random from set S, what is the probability that n/5 - 4 <= 0?

(1) Every term in S is an integer between 4 and 16, inclusive.
(2) S is a set of 13 integers.


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Re: If n is to be selected at random from set S, what is the probability  [#permalink]

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New post 20 Jan 2018, 23:20
Bunuel wrote:
If n is to be selected at random from set S, what is the probability that n/5 - 4 <= 0?

(1) Every term in S is an integer between 4 and 16, inclusive.
(2) S is a set of 13 integers.

n/5-4<=0 or, n<=20.

1) Since every term is between 4 & 16 i.e < 20, Probability of n<20 is 1. Sufficient.
2) We don't know which elements are <= 20 and which are >20. Hence insufficient.

Hence A.
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Re: If n is to be selected at random from set S, what is the probability  [#permalink]

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New post 23 Mar 2019, 05:20
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Re: If n is to be selected at random from set S, what is the probability   [#permalink] 23 Mar 2019, 05:20
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