Posted by **Madmazel** on Thursday, May 27, 2010 at 10:47am.

10 year old kids were asked to run around the track. Their times were normally distributed with a mean of 58.3 sec. and a standard deviation of 7.1 sec.

a) What percentage of times will be less than 50 seconds?

b) What percentage of times will be between 50 and 60 seconds?

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