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# Permutation problem help

Author Message
Intern
Joined: 06 Sep 2017
Posts: 11
GMAT 1: 700 Q48 V38
GPA: 3.7

### Show Tags

06 Oct 2017, 05:23
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:27) correct 0% (00:00) wrong based on 8 sessions

### HideShow timer Statistics

Pls help to solve this problem..

The letters D, G, I, I and T can be used to form 5-letter strings such as DIGIT or DGIIT. Using these letters, how many 5-letter strings can be formed in which the two occurrences of the letter I are separated by at least one other letter?

(A) 12
(B) 18
(C) 24
(D) 36
(D) 48

This is from OG 2018. I could not understand the logic even when i looked at the explanation..

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

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This discussion does not meet community quality standards. It has been retired.

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Math Expert
Joined: 02 Sep 2009
Posts: 50670

### Show Tags

06 Oct 2017, 05:27
1
GMSEMBA wrote:
Pls help to solve this problem..

The letters D, G, I, I and T can be used to form 5-letter strings such as DIGIT or DGIIT. Using these letters, how many 5-letter strings can be formed in which the two occurrences of the letter I are separated by at least one other letter?

(A) 12
(B) 18
(C) 24
(D) 36
(D) 48

This is from OG 2018. I could not understand the logic even when i looked at the explanation..

This question is discussed here: https://gmatclub.com/forum/the-letters- ... 20320.html

Please follow our rules when posting a question: https://gmatclub.com/forum/rules-for-po ... 33935.html Thank you.
_________________
Math Expert
Joined: 02 Sep 2009
Posts: 50670

### Show Tags

06 Oct 2017, 07:06
GMSEMBA wrote:
Pls help to solve this problem..

The letters D, G, I, I and T can be used to form 5-letter strings such as DIGIT or DGIIT. Using these letters, how many 5-letter strings can be formed in which the two occurrences of the letter I are separated by at least one other letter?

(A) 12
(B) 18
(C) 24
(D) 36
(D) 48

This is from OG 2018. I could not understand the logic even when i looked at the explanation..

For all OG questions check GMAC © Official Guides - The Master Directory + Links [QUANT]

Fore more check below:
ALL YOU NEED FOR QUANT ! ! !

Hope it helps.

--== 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: Permutation problem help &nbs [#permalink] 06 Oct 2017, 07:06
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