1. Find the value of 5 Permutations of set with 9 elements 2.In how many ways can set of five letters be selected from the english alphabet

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1. Find the value of 5 Permutations of set with 9 elements

2.In how many ways can set of five letters be selected from the english alphabet

WITH SOLUTION .... THANKS

Guest Mar 2, 2015

+23245

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Best Answer

1) Permutation of 9 items, 5 at a time: ₉P₅ = 9! / 4! = 9x8x7x6x 5 = 15120.

2) If order is important: ₂₆P₅ (If you want just a set, order isn't important.)

If order is not important: ₂₆C₅

geno3141 Mar 2, 2015

geno3141 · Answer 1 · 2015-03-02T04:00:07

1) Permutation of 9 items, 5 at a time: ₉P₅ = 9! / 4! = 9x8x7x6x 5 = 15120.

2) If order is important: ₂₆P₅ (If you want just a set, order isn't important.)

If order is not important: ₂₆C₅