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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Ex7.4, 7 In how many ways can one select a cricket team of eleven from 17 players in which only 5 players can bowl. If each cricket team of 11 must include exactly 4 bowlers? Total number ways = 5C4 12C7 = 5!/(4!(5 4)!) 12!/(7!(12 7)!) = 5!/4!1! 12!/7!5! = (12! )/(4! 7!) = (12 11 10 9 8 7! )/((4 3 2 1) 7!) = 3960

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.