Permutations And Combinations Question 23
Question: The number of ways in which the letters of the word ARRANGE can be arranged such that both R do not come together is [MP PET 1993]
Options:
A) 360
B) 900
C) 1260
D) 1620
Correct Answer: B $ \therefore $ The number of arrangements in which both RR do not come together = 1260 - 360 = 900.
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Answer:
Solution:
$ \therefore $ The total number of arrangements = $ \frac{7!}{2!2!1!1!1!}=1260 $ But, the number of arrangements in which both RR are together as one unit = $ \frac{6!}{2!1!1!1!1!}=360 $
BETA
