What is the probability that a high school junior

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The College Board National Office recently reported that in 2011-2012, the 547,038 high school juniors who took the ACT achieved a mean score of 530 with a standard deviation of 123 on the mathematics portion of the test Assume these test scores are normally distributed.

a. What is the probability that a high school junior who takes the test will score at least 610 on the mathematics portion of the test?

b. What is the probability that a high school junior who takes the test will score no higher than 460 on the mathematics portion of the test?

c. What is the probability that a high school junior who takes the test will score between 460 and 550 on the mathematics portion of the test?

d. How high does a student have to score to be in the top 10% of high school juniors on the mathematics portion of the test?

Reference no: EM132372843

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