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Mathematics, 02.09.2019 07:20 lulustar13

The times of all 15 year olds who run a certain race are approximately normally distributed with a given mean mc026-1.jpg = 18 sec and standard deviation mc026-2.jpg = 1.2 sec. what percentage of the runners have times less than 14.4 sec?
0.15%
0.30%
0.60%
2.50%

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