
Chapter 7
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Example 7.3
A placement company has conducted a written test to recruit people in a software company.
Assume that the test marks are normally distributed with mean 120 and standard deviation 50.
Calculate the following:
(a) Probability of randomly obtaining scores greater than 200 in the test.
(b) Probability of randomly obtaining a score that is 180 or less.
(c) Probability of randomly obtaining a score less than 80.
(d) Probability of randomly selecting a score between 70 to 170 for the exam.
(e) Probability of randomly obtaining a score between 80 to 110.
Solution:
(a) Probability of randomly obtaining scores greater than 200, ...