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anonymous

  • 5 years ago

A sample of 36 homeowners who recently hired a landscpaping sercived yielded the following info about their landscapper. Number of owners 22- yes would recoomend to more friends.5 would not. and 9 are not sure. 3 homeowners who provided info were selected at random. Dtermine the pro they would all recomend their landcapper. What is the pro that 3 homeowners would recomend their landscapper?

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  1. M
    • 5 years ago
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    (33/36)(32/35)(31/34)

  2. anonymous
    • 5 years ago
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    Of the one who would recommend

  3. M
    • 5 years ago
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    yes

  4. anonymous
    • 5 years ago
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    so all them or just one?

  5. M
    • 5 years ago
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    that is the probability of all 3 homeowner randomly selected will recommend their landscaper

  6. M
    • 5 years ago
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    you just hav eto multiply the fractions

  7. anonymous
    • 5 years ago
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    mulplying them all?

  8. M
    • 5 years ago
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    (33x32x31)/(36x35x34)

  9. M
    • 5 years ago
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    but it's easier to do it with factorials

  10. M
    • 5 years ago
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    33!/[(36-33)!(30!)]

  11. M
    • 5 years ago
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    crap made a mistake lol it's 22x21x20/36x35x34

  12. M
    • 5 years ago
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    just think probability of first person selected that would recommend landscaper is 22/36, then second is 21/35 since 1 recommender is already picked. then 20/34 since two recommenders are already picked

  13. anonymous
    • 5 years ago
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    but wouldnt it come to one answer?

  14. anonymous
    • 5 years ago
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    like one fraction alone?

  15. M
    • 5 years ago
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    9240/42840 if u multiply the fractions i gave u then u get that

  16. M
    • 5 years ago
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    that is the answer

  17. anonymous
    • 5 years ago
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    395841600?

  18. M
    • 5 years ago
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    no it's 0.2156 or 21.56%

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