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1. Is p(x)= x/7 for x=1,2,3,4 a valid probability distribution ? Explain why or why not? 2. If probability of getting a C is .2

1. Is p(x)= x/7 for x=1,2,3,4 a valid probability distribution ? Explain why or why not?

2. If probability of getting a C is .2 and probability of regularly attending class and getting a C is .05. are "attending class regularly" and "getting a C in the class" independent events? show why or why not?

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