/ In a laboratory two types of tests done for a concrete cubes: compression Q4) ( streng.h test and water absorption test .40% passed in compression test. 20% failed in water absorption test and 12% failed in both. Find: 1) the probability that a random sample selected is bad in compression test and good in absorption test. 2) the 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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