3. In a Math test, the mean score is 45 and the standard deviation is 4. Assuming normality,what is the probability that a score picked at random will liea. above score 50?b. below score 38?4. The scores in the final test in Filipino of all grade 8 students in a certain school are normallydistributed. If the population mean is equal to 50 and the standard deviation is 8, what is thevalue of the score x that leaves 20.9% of the area to the left of the z-score of x?

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3. In a Math test, the mean score is 45 and the standard deviation is 4. Assuming normality, what is the probability that a score picked at random will lie a. above score 50? b. below score 38?

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

3. In a Math test, the mean score is 45 and the standard deviation is 4. Assuming normality,
what is the probability that a score picked at random will lie
a. above score 50?
b. below score 38?
4. The scores in the final test in Filipino of all grade 8 students in a certain school are normally
distributed. If the population mean is equal to 50 and the standard deviation is 8, what is the
value of the score x that leaves 20.9% of the area to the left of the z-score of x?

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