Home › AP EAPCET (Engineering) › Mathematics › Permutations and Combinations › When all n objects are distinct and arranged in …
When all n objects are distinct and arranged in a line, nPn equals
An
B1
Cn!
Dn^2
Answer & Solution
Correct answer: C. n!
Putting r = n in nPr = n!/(n-r)! gives n!/0! = n!.
Related questions
Al-Khalil's cryptography book listed words using which idea?A permutation of a finite set is what kind of function on that set?A k-combination of a set S is best described as what?Cauchy's 1815 memoir on substitutions of n elements led to which notion?Which Chinese text used permutation-like hexagrams as early as 1000 BC?How many elements does the symmetric group on 4 objects contain?In how many ways can the letters of BANANA be arranged?A multiset permutation uses each element how many times?