1.Bill eats 10 sandwiches a week. What is the probability Bill eats at least one sandwich tomorrow?

24%

69%

143%

76%

17%

2.In one 8-hour work day we observed someone use the water cooler on 48 separate occasions. Let X be the number of times the water cooler is used tomorrow. What is the probability that X is between 40 and 50? You can find the exact answer or use a normal approximation; pick the option that is closest to your answer.

48%

54%

63%

98%

22%

3.We see an average of 1 shooting star in the sky every 12 minutes. What is the probability that we see exactly 5 shooting stars in the next hour?

.1755

.3679

.0127

.1182

.0001