Math, asked by xzxzxzxz6046, 6 months ago

From a group of 15 chess players 8 players are selected by lot to represent the group at a convention. What is the probability that the 8selected include 3of the 4best players in the group?​

Answers

Answered by Stoneheartgirl
3

Step-by-step explanation:

A wins the series the following ways. In all these cases the last match has been win by A

(a) A wins all the games in a row. The number of ways. =1

(b) A wins the last game on the remaining 4 games played. A wins three games while B wins one.

The no. of ways .

3!

4!

.

3!

4×3!

.4

(c) A wins the last game on the remaining 5 games played. A wins three while B wins two.

The number of ways .

3!.2!

5!

=10.

(d) A wins the last game on the remaining 6 games played. A wins three while B wins three.

The number of ways .

3!.3!

5!

=20

∴ The total no. of ways in which the series can be won by A=1+4+10+20=35

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