Ian Chen asked in 科學數學 · 9 years ago

我有一個大學的機率數學題 ><!急

a social scientist claims that only 50 percent of all high school seniors capable of doing college work actually go to college. assuming that this claim is true, that among 18 high school seniors capable of doing college work

a. exactly 10 will go to college

b. at least 10 will go to college

c. at most eight will go to college

please steps by steps!

2 Answers

Rating
  • 9 years ago
    Favorite Answer

    經查Binomial Distribution 表,得到:

    a. exactly 10 will go to college

    P(x=10)=0.7597-0.5927=0.167

    b. at least 10 will go to college

    P(x≦9)= 0.5927

    P(x≧10)=1- 0.5927=0.4073

    c. at most eight will go to college

    P(x≦8)= 0.4073

    Source(s): Binomial Distribution 表
  • 阿銘
    Lv 7
    9 years ago

    a. exactly 10 will go to college

    18

    C /2^18

    10

    b. at least 10 will go to college

    18 18 18 18 18 18 18 18 18

    (C +C +C +C +C +C +C +C +C )/2^18

    10 11 12 13 4 15 16 17 18

    c. at most eight will go to colleg

    18 18 18 18 18 18 18 18

    (C +C +C +C +C +C +C +C )/2^18

    1 2 3 4 5 6 7 8

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