4. If the probability that student A will fail a certain statıs- tics examination is 0.5, the probability that student B will fail the examination is 0.2, and the probability that both student A and student B will fail the examination is 0.1, what is the probability that at least one of these two stu- dents will fail the examination? 5. For the conditions of Exercise 4, what is the probability that neither student A nor student B wvill fail the examina- tion?

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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4. If the probability that student A will fail a certain statis-
tics examination is 0.5, the probability that student B will
fail the examination is 0.2, and the probability that both
student A and student B will fail the examination is 0.1,
what is the probability that at least one of these two stu-
dents will fail the examination?
5. For the conditions of Exercise 4, what is the probability
that neither student A nor student B will fail the examina-
tion?
Transcribed Image Text:4. If the probability that student A will fail a certain statis- tics examination is 0.5, the probability that student B will fail the examination is 0.2, and the probability that both student A and student B will fail the examination is 0.1, what is the probability that at least one of these two stu- dents will fail the examination? 5. For the conditions of Exercise 4, what is the probability that neither student A nor student B will fail the examina- tion?
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