Unformatted text preview: after 290 days? b) Births with gestation time of 258 days or less are considered to be premature births. What is the probability that a randomly selected pregnant woman will give birth to a premature baby? #3) Suppose there are three balls in a box. On one of the balls is the number 1, on another is the number 2, and on the third is the number 3. You select two balls at random and without replacement from the box and note the two numbers observed. The sample space S consists of the three equally likely outcomes {(1, 2), (1, 3), (2, 3)} (disregarding order). Let X be the sum of the two balls selected. a) Write down the probability distribution of X. b) What is the probability that the sum is at least 4? c) What is the mean of X ? #4) Solve problem # 4.74 from the textbook....
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 Fall '08
 ABDUS,S.
 Probability, pregnant woman, appliance repair shop, Repair calls

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