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Suppose that 30% of students prefer to write with a mechanical pencil. Suppose we sample students, one at a time, and stop as soon as
Suppose that 30% of students prefer to write with a mechanical pencil. Suppose we sample students, one at a time, and stop as soon as we have selected one who prefers to write witha mechanical pencil. The probability that we will select2 or fewerstudents is
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