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# An integer is randomly chosen from 2 to 20 inclusive. What is the prob

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Math Expert
Joined: 02 Sep 2009
Posts: 58320
An integer is randomly chosen from 2 to 20 inclusive. What is the prob  [#permalink]

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17 Dec 2018, 01:26
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Difficulty:

15% (low)

Question Stats:

75% (00:33) correct 25% (00:41) wrong based on 33 sessions

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An integer is randomly chosen from 2 to 20 inclusive. What is the probability that the number is prime?

A. 7/19
B. 8/19
C. 10/19
D. 11/19
E. 12/19

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Re: An integer is randomly chosen from 2 to 20 inclusive. What is the prob  [#permalink]

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17 Dec 2018, 01:52
2
Bunuel wrote:
An integer is randomly chosen from 2 to 20 inclusive. What is the probability that the number is prime?

A. 7/19
B. 8/19
C. 10/19
D. 11/19
E. 12/19

total integers 2 to 20 inclusive ; 20-2 +1 = 19

prime no ( 2,3,5,7,11,13,17,19) = P ( 8/19) = IMO B
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Re: An integer is randomly chosen from 2 to 20 inclusive. What is the prob   [#permalink] 17 Dec 2018, 01:52
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