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Math Help - Probability of shoes

  1. #1
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    Question Probability of shoes

    90% of the items in the shoe department are on sale. What is the probabilty that exactly 24 of the 37 shoes that Leah buys are on sale?


    so (9/10) are on sale and they say (24/37) which could be (48/74)

    i need a place to start
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  2. #2
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    Quote Originally Posted by lucifer_x View Post
    90% of the items in the shoe department are on sale. What is the probabilty that exactly 24 of the 37 shoes that Leah buys are on sale?


    so (9/10) are on sale and they say (24/37) which could be (48/74)

    i need a place to start
    X ~ Binomial(n = 37, p = 0.9). Calculate Pr(X = 24).
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