0 votes 0 votes total possible 4 digit numbers from 2,3,5,6,7,9 without repetition? total numbers possible less than 500? 360, 130 360, 100 240, 120 none Combinatory combinatory + – gate_forum asked Jan 9, 2016 retagged Jun 27, 2017 by Arjun gate_forum 1.6k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
2 votes 2 votes 4 Digit Numbers Possible = 6C4 * 4! =15*24=360 Numbers less than 500= Starting with 2,3 * 5C3 *3! =2* 20 * 6 = 120 Hareesh Kumar answered Jan 9, 2016 Hareesh Kumar comment Share Follow See all 4 Comments See all 4 4 Comments reply Himanshu1 commented Jan 9, 2016 reply Follow Share 2,3 * 5C3 *3! - Here why 5C3 ? 0 votes 0 votes Hareesh Kumar commented Jan 9, 2016 reply Follow Share First Digit = 2,3 Reamaining 3 digits can be choosen from 5 digits i.e 5C3 and they can be arranged in 3! ways 0 votes 0 votes Praveen Saini commented Jan 9, 2016 reply Follow Share Total possible 6 choice at first place 5 choice at second place 4 choices at third place 3 choice at last Total =6*5*4*3=360 For less than 5000 Two choice at first place Five choice at second Four at Third place Three at last place 2*5*4*3=120 For less than 500, No number possible with given digits, 0. 1 votes 1 votes nilamd commented Jan 28, 2016 reply Follow Share Cant we do like Without repitition:2*5*4 With rep. : 2*6*6?? For less than 500 0 votes 0 votes Please log in or register to add a comment.