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The time taken, in seconds, for Grade 10 students to run the 200 metre race is normally distributed with a mean of 28 seconds and

The time taken, in seconds, for Grade 10 students to run the 200 metre race is normally distributed with a mean of 28 seconds and a standard deviation of 2 seconds.What percent of students take:

a) Less than 26 seconds?

b) Between 22 seconds and 30 seconds?

c) Between 30 and 32 seconds?

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