Opre homework

question 7

Question 7 The results of a survey of 800 married couples and the number of children they had is shown below Number of Children Probability 0 0.1 0.3 2 0.4 3 0.2 What is the expected value of the number of children in a family? O a. 1 O b. 1.7 O c. 2 O d. 1.5Question 8 Two events, A and B, are mutually exclusive and each has a nonzero probability. If event A is known to occur, the probability of the occurrence of event B is O a. one O b. any positive value O c. zero O d. any value between 0 to 1Question 9 The weights of items produced by a company are normally distributed with a mean of 5 ounces and a standard deviation of 0.2 ounces. What is the minimum weight of the heaviest 9.85% of all items produced? If you want to use Excel to solve this question, download this blank sheet: Blank sheet.xIsx a. 9.850 O b. 1.290 O c. 4.742 O d. 5.258