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Q.

In a tournament, team X plays with each of the 6 other teams once. For each match the
probability of a win, draw and loss are equal. If the probability that the team X, finishes with more wins than losses is  pq where p and q are co-prime then the sum of digits of |p-q| is.

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answer is 10.

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Detailed Solution

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The correct option is B 294
          Total number of results=36=729  
          Required number of ways
=12(729(Number  of  ways  inwhichteamTfinishewithequalnumberofwinsandlosses))
Now, we shall consider following cases:
Case 1: 0 draw, 3 wins and 3 losses
WWWLLL
Number of ways=6!3!3!=C3   6=20 
Case II: 1 win, 1loss, 4draws: 
WWLLDD
Number of ways =6!4!=30
Case III: 2 wins, 2losses, 2draws: WWLLDD
Number of ways P(A)=9991000×998999×..........×1000k+11000k+2×11000k+1
Case IC: no win and no loss, 6draws: DDDDDD
 Number of ways=1
Total ways with equal wins and draws=30+30+90+4=141 
So, required number of ways =12(729141)=5882=294

pq=98293

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