In a laboratory, there are two types of tests done for a concrete cubes: compression strength test and water absorption test .25% failed in compression test. 40% passed in water absorption test and 15% failed in both. Find: 1) Probability that a random sample selected is bad in compression test and good in absorption test. 2) Probability that a random sample selected is bad in absorption test and good in compression test. 3) The probability that a random sample selected is good in both test. 4) The probability that a random sample selected at least one of them is bad.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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In a laboratory, there are two types of tests done for a concrete cubes: compression strength
test and water absorption test .25% failed in compression test. 40% passed in water
absorption test and 15% failed in both. Find:
1) Probability that a random sample selected is bad in compression test and good in
absorption test.
2) Probability that a random sample selected is bad in absorption test and good in
compression test.
3) The probability that a random sample selected is good in both test.
4) The probability that a random sample selected at least one of them is bad.
Transcribed Image Text:In a laboratory, there are two types of tests done for a concrete cubes: compression strength test and water absorption test .25% failed in compression test. 40% passed in water absorption test and 15% failed in both. Find: 1) Probability that a random sample selected is bad in compression test and good in absorption test. 2) Probability that a random sample selected is bad in absorption test and good in compression test. 3) The probability that a random sample selected is good in both test. 4) The probability that a random sample selected at least one of them is bad.
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