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March 26, 2017

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A study shows that 10% of americans are left-handed.
Find the probability that at most one student is left handed in a class of 20 students.

  • Statistics - ,

    P(x)=.10
    "at most" means "binomialCDF" on calculator.
    1 student is upper value, 0 is lower value.
    n=20 or number of trials.
    ANSWER: CDF=.39 or ~39% that at most one student is left handed in a class of 20 students.

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