Question 1099336
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Let S = the number of successes
Let F = the number of failures

Then
                S
Probability = —————
               S+F

Odds in favor = S to F = S:F


Odds against = F to S = F:S 

You are given
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The odds against an event are 49 to 2.
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So F = 49,  S = 2

Substitute to find the probability.

Edwin</pre>