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In how many ways can the letters of the word GOSSAMERE be re
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13 May 2019, 10:46
13 May 2019, 10:46
Expert Reply
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Question Stats:
52% (01:44) correct
47% (01:01) wrong based on 17 sessions
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In how many ways can the letters of the word GOSSAMERE be rearranged such that all S’s and M’s appear in the middle?
(A) \(\frac{9!}{2!*2!}\)
(B) \(\frac{7P_6}{2!*2!}\)
(C) \(\frac{7P_6}{2!} * \frac{3P_3}{2!}\)
(D) \(\frac{6P_6}{2!} * \frac{3P_3}{2!}\)
(E) \(\frac{10P_6}{2!} * \frac{3P_3}{2!}\)
(A) \(\frac{9!}{2!*2!}\)
(B) \(\frac{7P_6}{2!*2!}\)
(C) \(\frac{7P_6}{2!} * \frac{3P_3}{2!}\)
(D) \(\frac{6P_6}{2!} * \frac{3P_3}{2!}\)
(E) \(\frac{10P_6}{2!} * \frac{3P_3}{2!}\)
GRE Prep Club Tests Editor
Joined: 13 May 2019
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Posts: 186
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Location: United States
GMAT 1: 770 Q51 V44
GRE 1: Q169 V168
WE:Education (Education)
Re: In how many ways can the letters of the word GOSSAMERE be re
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14 May 2019, 08:35
14 May 2019, 08:35
Expert Reply
When encountering GRE problems using C or P notation in the choices, consider logical elimination rather than working through the entire problem to save time and avoid unnecessary steps. In this case, we know that there will be three letters (two Ss and one M) used in a subset in the center of the arrangement and then six other letters to be arranged on the outside of those interior two Ss and M. So, look for a choice involving both choosing from both 6 and 3 terms. Only choice D properly articulates this situation and is the correct answer.
gmatclubot
Re: In how many ways can the letters of the word GOSSAMERE be re [#permalink]
14 May 2019, 08:35
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