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Math Help - Probability

  1. #1
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    Probability

    In order for a fst food restaurant to recieve a superior rating, the kitchen staff must recieve a rating of at least 4 on a scale from 1 to 5 and the counter crew must receive a rating of 5 on a scale from 1 to 5 during a corporate review. The probability of a kitchen drew recieving a score of 4 or better in ant given restaurant is 87%. The probability the counter crew recieves a rating of 5 is 75% fir any given restaurant.

    a. Find the probability that a restaurant recieves a superior rating.
    b. Find the probability that a restaurant will not recieve high enough scores in either catergory.
    c. Find the probability that a restaurant will not recive a superior rating.
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  2. #2
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    Quote Originally Posted by TLC918 View Post
    In order for a fst food restaurant to recieve a superior rating, the kitchen staff must recieve a rating of at least 4 on a scale from 1 to 5 and the counter crew must receive a rating of 5 on a scale from 1 to 5 during a corporate review. The probability of a kitchen drew recieving a score of 4 or better in ant given restaurant is 87%. The probability the counter crew recieves a rating of 5 is 75% fir any given restaurant.

    a. Find the probability that a restaurant recieves a superior rating.
    b. Find the probability that a restaurant will not recieve high enough scores in either catergory.
    c. Find the probability that a restaurant will not recive a superior rating.
    Assume that the score received by the kitchen staff is independent of the score received by the counter crew. Then use the formula Pr(A and B) = Pr(A) Pr(B).
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    Answer

    I am still not getting the problem. I need more details on how to figure it out and where you got the #
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  4. #4
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    Quote Originally Posted by TLC918 View Post
    In order for a fst food restaurant to recieve a superior rating, the kitchen staff must recieve a rating of at least 4 on a scale from 1 to 5 and the counter crew must receive a rating of 5 on a scale from 1 to 5 during a corporate review. The probability of a kitchen drew recieving a score of 4 or better in ant given restaurant is 87%. The probability the counter crew recieves a rating of 5 is 75% fir any given restaurant.

    a. Find the probability that a restaurant recieves a superior rating.
    b. Find the probability that a restaurant will not recieve high enough scores in either catergory.
    c. Find the probability that a restaurant will not recive a superior rating.
    a. Pr(kitchen staff get a rating more than 4) times Pr(counter crew get a score of 5) = (0.87)(0.75) = .....

    b. Pr(kitchen staff get a rating less than 4) = 1 - 0.87 = 0.13.
    Pr(counter crew get a score less than 5) = 1 - 0.75 = 0.25.

    c. Pr(kitchen staff get a rating less than 4) times Pr(counter crew get a score less 5) = .......
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