he amounts of time per workout an athlete uses a stairclimber are normally distributed, with a mean of 23 minutes and a standard deviation of 6 minutes. Find the probability that a randomly selected athlete uses a stairclimber for (a) less than 20 minut etween 23 and 31 minutes, and (c) more than 30 minutes. 1) The probability that a randomly selected athlete uses a stairclimber for less than 20 minutes is Round to four decimal places as needed.) C

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