Misc 8 - Chapter 6 Class 11 Permutations and Combinations

Transcript

Misc 8 Determine the number of 5-card combinations out of a deck of 52 cards if each selection of 5 cards has exactly one king. There are total 4 King Cards out of 52 We have to select 1 King from 4 King cards The Remaining 4 we have to select from 48 cards (52 − 4 king cards) Total number of ways = 4C1 × 48C4 = 4!/1!(4 − 1)! × 48!/4!(48 − 4)! = 4!/1!3! × 48!/4!44! = 48!/(3! × 44!) = (48 × 47 × 46 × 45 × 44!)/((3 × 2 × 1) × 44!) = 778320