At a carnival game, a large horizontal board has twenty holes of the same size cut in it. For the game, you toss a ball onto the board and it lands or rolls into one of the holes. The board is surrounded on all sides, so the ball is certain to fall in a hole. Three of the holes will earn a small prize and one of the holes will earn a large prize. If Grady buys a ticket for one ball that he'll toss on the board, what is the probability that he'll win a prize?

Question

anonymous · Answer

Probability (X occuring) =

       Number of Ways X can occur
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    Total number of possible outcomes