The table below summarizes challenges by professional tennis players from the first U. S. Open that used the Hawk-Eye electronic system for displaying an instant replay used to determine whether the ball is in bounds or out of bounds.
Answer the following questions? (Express your answer as fractions, or as decimals rounded to 4 decimal places)
a) What is the probability that a challenge was successful?
b) What is the probability that a challenge was made by a female?
c) What is the probability that a challenge was made by a male or was not successful?
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