No, sometimes they will be equal (when all items being permutated are all different, eg all permutations of {1, 2, 3} are distinguishable).
Chat with our AI personalities
No. The number of permutations or combinations of 0 objects out of n is always 1. The number of permutations or combinations of 1 object out of n is always n. Otherwise, yes.
Since there are no duplicate letters in the word RAINBOW, the number of permutations of those letters is simply the number of permutations of 7 things taken 7 at a time, i.e. 7 factorial, which is 5040.
If there are n different objects, the number of permutations is factorial n which is also written as n! and is equal to 1*2*3*...*(n-1)*n.
There are 16 choices for the first number and 15 choices for the second number (since repetition is not allowed). Thus, there are a total of 16 x 15 = 240 two-number permutations.
Suppose you have n objects and within those, there arem1 objects of kind 1m2 objects of kind 2and so on.Then the number of permutations of the n objects is n!/[m1!* m2!...]For example, permutations of the word "banana"n = 6there are 3 "a"s so m1 = 3there are 2 "n"s so m2 = 2therefore, the number of permutations = 6!/(3!*2!) = 720/(3*2) = 120.