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Math Help - Probability Question.

  1. #1
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    Probability Question.

    1. In the game of Bingo, the numbers 1 to 75 are marked on balls and drawn from a container that constantly mixes the balls. Fifteen balls, numbered 1 to 15, are marked with a B; the next fifteen with an I; and so on.

    a) What is the probability that an O is drawn first? Ans: 1/5

    b) What is the probability that a multiple of 5 is drawn first? 1/5
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  2. #2
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    Quote Originally Posted by Skoz View Post
    1. In the game of Bingo, the numbers 1 to 75 are marked on balls and drawn from a container that constantly mixes the balls. Fifteen balls, numbered 1 to 15, are marked with a B; the next fifteen with an I; and so on.

    a) What is the probability that an O is drawn first? Ans: 1/5

    Mr F says: 5/75 .....

    b) What is the probability that a multiple of 5 is drawn first? 1/5

    Mr F says: How many multiples of 5 are there in the first 75 numbers? Now divide that number by 75 .....
    ..
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  3. #3
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    wouldnt part a be 15/75 ?
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    Quote Originally Posted by djmccabie View Post
    wouldnt part a be 15/75 ?
    Correct. My typo.
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