Permutations And Combinations Question 199
Question: If $ ^{n}P_4=24.{{}^{n}}C_5, $ then the value of n is [Karnataka CET 2001]
Options:
A) 10
B) 15
C) 9
D) 5
 Correct Answer: C $ \Rightarrow  $  $ 1=\frac{(n-4)}{5} $Show Answer
  Answer:
Solution:
Þ  $ n-4=5 $
Þ  $ n=9 $ .
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