Mathematics, 04.11.2020 01:50 cxttiemsp021

3500 students take a college entrance exam. The scores on the exam have an approximately normal distribution with mean u = 57 points and standard deviation o = 12 points. Use the 68-95-99.7 rule to complete the following.
(a) Estimate the percentage of students scoring between 33 and 81 points.
(b) Estimate the percentage of students scoring 57 points or more.
(c) Estimate the percentage of students scoring 81 points or more.
(a) Approximately 1% of the students score between 33 and 81 points.
(Type an integer or a decimal.)

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