2. (25p) You are about to take a 16-question true-false test. Assume you answer all 16...

2. (25p) You are about to take a 16-question true-false test. Assume you answer all 16 questions by guessing.
What is the probability of getting more than 10 questions correct?

3. (25p) A telephone number is selected at random from a directory. Suppose X denote the last digit of selected telephone number. Find the probability that the last digit of the selected number is
a. 5
b. less than 5
c. greater than or equal to 9

4. (25p) Suppose that the random variable Family income ~ N($65000, $320002). If the poverty level is $24,000, what percentage of the population lives in poverty?

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orchestra answered 1 year ago

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