Permutations And Combinations Question 186
Question: $ ^{n}P _{r}{{\div }^{n}}C _{r} $ = [MP PET 1984]
Options:
A) $ n! $
B) $ (n-r)! $
C) $ \frac{1}{r!} $
D) $ r! $
Correct Answer: D
Show Answer
Answer:
Solution:
BETA
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