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Math Help - Don't know what formula to use...

  1. #1
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    Don't know what formula to use...

    I need help with this problem. Don't know which formula to use and where to start. Please help....

    It has been estimated that about 30% of frozen chicken contain enough salmonella bacteria to cause illness if improperly cooked. A consumer purchases 15 frozen chickens. What is the probability that the consumer will have less than 3 contaminated chickens? Round to 3 decimal places.

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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by vedmachka View Post
    I need help with this problem. Don't know which formula to use and where to start. Please help....

    It has been estimated that about 30% of frozen chicken contain enough salmonella bacteria to cause illness if improperly cooked. A consumer purchases 15 frozen chickens. What is the probability that the consumer will have less than 3 contaminated chickens? Round to 3 decimal places.
    Use the binomial distribution.

    n = 15, p = 0.3 \implies q = 0.7. you want P(X < 3) = P(0) + P(1) + P(2)
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  3. #3
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    Sorry...

    Thank you so much for the formula, but I don't know how to solve that.
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by vedmachka View Post
    Thank you so much for the formula, but I don't know how to solve that.
    i told you the formula and gave you the parts, it is just plug and chug from here. where are you stuck?

    see post #2 here

    and here

    and here

    and post #34 here
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