how many words , with or without meaning , can be formed using all letters of the word sharp using each letter exactly once ?
"the word sharp has exactly 5 letters which are all different . therefore the number of words that can be formed = number of permutations of 5 letters taken all at a time . = p ( 5 , 5 ) = 5 ! = 5 x 4 x 3 x 2 × 1 = 120 answer : d"
factorial(const_3)