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12 Mar 2021, 03:15
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (00:41) correct
11%
(00:55)
wrong
based on 153
sessions
History
Date
Time
Result
Not Attempted Yet
How many seven-letter words can be formed from the letters of the word “COUNTRY” beginning with C and ending with Y ?
(A) 5040
(B) 750
(C) 720
(D) 240
(E) 120
(A) 5040
(B) 750
(C) 720
(D) 240
(E) 120
13 Mar 2021, 00:32
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Bunuel
So we have 2 positions out of 7 fixed, and remaining 5 can be arranged in 5! or 120 ways.
C,_,_,_,_,_,Y
E
DD06
Joined: 07 Dec 2020
Last visit: 26 Aug 2023
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13 Mar 2021, 00:40
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Is the answer (E) 120?
Solution: there are 7 letters to be arranged, its given that first and last are fixed. So, now it looks like this:
C _ _ _ _ _ _ Y
we have to arrange 5 letters in places that can be done in 5! ways iE 120.
Solution: there are 7 letters to be arranged, its given that first and last are fixed. So, now it looks like this:
C _ _ _ _ _ _ Y
we have to arrange 5 letters in places that can be done in 5! ways iE 120.
