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# A box contains tickets numbered 1 to 20. 3 tickets are drawn

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Intern
Joined: 01 Jan 2016
Posts: 28
A box contains tickets numbered 1 to 20. 3 tickets are drawn  [#permalink]

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24 Jul 2017, 10:38
1
1
00:00

Difficulty:

(N/A)

Question Stats:

50% (00:25) correct 50% (01:04) wrong based on 8 sessions

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A box contains tickets numbered 1 to 20. 3 tickets are drawn from the box with replacement. The probability that the largest number on the ticket is 7 is

(1) 2/19
(2) 7/20
(3) (7^3 -1)/ (20)^3
(4) (7/20)^3
(5) None of these

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Intern
Joined: 07 Jun 2017
Posts: 10
Re: A box contains tickets numbered 1 to 20. 3 tickets are drawn  [#permalink]

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24 Jul 2017, 11:01
There are 7 cards out of 20 you can draw to make the highest no. as 7. With replacement means you put it back inside after each drawn. So the probability should be (7/20)^3
Intern
Joined: 07 Jun 2017
Posts: 10
Re: A box contains tickets numbered 1 to 20. 3 tickets are drawn  [#permalink]

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24 Jul 2017, 11:14
The answer is (7^3 -1)/ (20)^3?

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: A box contains tickets numbered 1 to 20. 3 tickets are drawn   [#permalink] 24 Jul 2017, 11:14
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