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28 May, 09:43

The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words per minute and a standard deviation of 24 words per minute. What is the probability that a randomly selected sixth-grade student reads less than 100 words per minute?

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  1. 28 May, 11:13
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    0.148783124

    Step-by-step explanation:

    the probability that a randomly selected sixth-grade student reads less than 100 words per minute

    P (X < 100)

    = P (z < (100 - 125) / 24))

    = P (z < - 1.0417) (from the z-table)

    = 0.148783124
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