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Tamil Nadu Board of Secondary EducationHSC Science Class 11

A Kabaddi coach has 14 players ready to play. How many different teams of 7 players could the coach put on the court? - Mathematics

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Question

A Kabaddi coach has 14 players ready to play. How many different teams of 7 players could the coach put on the court?

Sum

Solution

Number of kabaddi players = 14

7 players must be selected from 14 players

Number of ways of selecting 7 players from 14 players is

= 14C7

= `(14!)/(7!(14 - 7)!)`

= `(14!)/(7!7!)`

= `(14 xx 13 xx 12 xx 1 xx 10 xx 9 xx 8 xx 7!)/(7! xx 7 xx 6xx 5 xx 4 xx 3 xx 2 xx 1)`

= `(14 xx 13 xx 12 xx11 xx 10 xx 9 xx 8)/(7 xx 6 xx 5 xx 4 xx 3 xx 2 xx 1)`

= 13 × 11 × 4 × 3 × 2

= 3432

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Chapter 4: Combinatorics and Mathematical Induction - Exercise 4.3 [Page 186]

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Samacheer Kalvi Mathematics - Volume 1 and 2 [English] Class 11 TN Board
Chapter 4 Combinatorics and Mathematical Induction
Exercise 4.3 | Q 9. (i) | Page 186

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