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the probability that an imdividual is left-handed is 0.30 in a class of 25 students, what is the the mean and standard deviation of the number of left-handers in the class

  • math -

    Mean = np = 25 * .3 = ?
    Standard deviation = √npq = √(25)(.3)(.7) = ?
    Note: q = 1 - p

    I'll let you finish the calculations.

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