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11TH · MATH

Question 3

menu_bookSolutionmenu_bookTheorymenu_book•(i)nCr=56{}^nC_r = 56nCr​=56, ${}^nP_r = 336$menu_book•(ii)n−1Cr−1:nCr:nCr=1:3:7{}^{n-1}C_{r-1} : {}^nC_r : {}^nC_r = 1 : 3 : 7n−1Cr−1​:nCr​:nCr​=1:3:7
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school

11TH · MATH

Question 3

menu_bookSolutionmenu_bookTheorymenu_book•(i)nCr=56{}^nC_r = 56nCr​=56, ${}^nP_r = 336$menu_book•(ii)n−1Cr−1:nCr:nCr=1:3:7{}^{n-1}C_{r-1} : {}^nC_r : {}^nC_r = 1 : 3 : 7n−1Cr−1​:nCr​:nCr​=1:3:7
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Accedmychevron_right11thchevron_rightmathchevron_rightPermutations And Combinationschevron_rightExercise 7.4

See detailed working.

Answer: (computed)

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