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Question

Sixteen players S1,S2,,S16 Play in a tournament.They are divided into eight play in a tounament. They are divided into eight pairs at random.From each pair a winner is decided on the basis of a game played between the two players on the basis of a game played between the two players of the pair. Assume that all the players are of equal Strength. Find the probability that the player S1is among the eigth winners.

A
116
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B
18
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C
12
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D
14
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Solution

The correct option is D 116
Here the probability of winning is 12λ for each player in a pair as all players are of equal strength.
So the player S1will be among 8 winners as there are 8 pairs,
Hence the required probability P(s1)=18.12=116

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