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Students who have completed a speed reading course have reading speeds that are normally distributed with...

Students who have completed a speed reading course have reading speeds that are normally distributed with a mean of 950 words per minute and a standard deviation equal to 200 words per minute. If 10 students are selected at random, what is the probability that at most two of them would read at less than 850 words per minute?

0.22
0.64
0.36
0.78
Math   Statistics-And-Probability   
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