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Each integer from 1 to 50 whose units digit is a 3 is writte
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22 May 2017, 00:53
22 May 2017, 00:53
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Question Stats:
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Each integer from 1 to 50 whose units digit is a 3 is written on a slip of paper and placed in a box. If two slips of a paper arc drawn at random without replacement, what is the probability that both the numbers picked are prime?
Enter your value as fraction
Show: :: OA
\(\frac{3}{5}\)
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Re: Each integer from 1 to 50 whose units digit is a 3 is writte
[#permalink]
05 Aug 2017, 13:33
05 Aug 2017, 13:33
3
Carcass wrote:
Each integer from 1 to 50 whose units digit is a 3 is written on a slip of paper and placed in a box. If two slips of a paper arc drawn at random without replacement, what is the probability that both the numbers picked are prime?
Enter your value as fraction
Show: :: OA
\(\frac{3}{5}\)
Each integer from 1 to 50 whose units digit is a 3 is written on a slip of paper and placed in a box.
So, the numbers in the box are: 3, 13, 23, 33, and 43 (5 numbers)
Among those 5 numbers, the primes are: 3, 13, 23, and 43 (4 numbers)
P(both are prime) = P(1st number is prime AND 2nd number is prime)
= P(1st number is prime) x P(2nd number is prime)
= 4/5 x 3/4
= 3/5
Answer: 3/5
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Re: Each integer from 1 to 50 whose units digit is a 3 is writte
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21 Sep 2020, 04:17
21 Sep 2020, 04:17
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Re: Each integer from 1 to 50 whose units digit is a 3 is writte
[#permalink]
06 Feb 2023, 04:14
06 Feb 2023, 04:14
Hello from the GRE Prep Club BumpBot!
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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