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Thread: easy probability question

  1. November 4th 2010, 02:34 PM #1
    anna12345
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    easy probability question

    A certain airplane holds 184 passengers. The rate of passengers' no-show is 9% and they sell 201 tickets. Is it likely that they will not have enough seats. It seems easy but i'm stuck
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  2. November 4th 2010, 05:05 PM #2
    mr fantastic
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    Quote Originally Posted by anna12345 View Post
    A certain airplane holds 184 passengers. The rate of passengers' no-show is 9% and they sell 201 tickets. Is it likely that they will not have enough seats. It seems easy but i'm stuck
    Let X be the random variable "number of passengers who show up".

    X ~ Binomial(n = 201, p = 0.91). Calculate \Pr(X \geq 185) and draw a conclusion.
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