Question 685074
The probability that a particular football team wins its next game is 5/7. What are the odds for the team winning it next game? What are the odds against the team winning its next game? 
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Odds "for" = P(for)/P(against) = (5/7)/(2/7) = 5:2
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Odds "against" = P(against)/P(for) = (2/7)/(5/7) = 2:5
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Cheers,
Stan H.