Question 552671: when playing bingo, 75 balls are placed in a bin and balls are selected at random. each ball is marked with a letter and a number as indicated in the following chart. B I N G O
1-15 16-30 31-45 46-60 61-75
For example, there are balls marked b1, b2, up to b15; i16, i17, up to i30; and so on. Assuming one bingo ball is selected at random, determine the odd against it containing the letter G.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! when playing bingo, 75 balls are placed in a bin and balls are selected at random. each ball is marked with a letter and a number as indicated in the following chart. B I N G O
1-15 16-30 31-45 46-60 61-75
For example, there are balls marked b1, b2, up to b15; i16, i17, up to i30; and so on. Assuming one bingo ball is selected at random, determine the odd against it containing the letter G.
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# of G-balls: 15
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# of non-G balls: 60
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P(non-G) = 60/75
P(G-balls) = 15/75
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Odds against it being a G-ball = (60/75)/(15/75) = 60/15 = 4:1
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Cheers,
Stan H.
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