Easy
In an apartment,there are $30$ kids. If each kid plays table tennis with every other kid exactly once,then the total number of matches played by them is:
- A$^{30}C_2$
- B$^{30}P_2$
- C$^{30}C_2 - 1$
- D$^{30}P_2 - 1$
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Similar Questions
$A$ committee of $12$ members is to be formed from $9$ women and $8$ men. The number of committees in which the women are in majority is
Compute $\frac{12!}{10! \times 2!}$
Easy
View SolutionIn how many ways can a committee of $6$ members be formed out of $10$ members,such that it always includes a specified member?
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Difficult
View SolutionIf $^{2n}C_2 : ^nC_2 = 9:2$ and $^nC_r = 10$,then $r = $
Easy
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