1)A data set of unknown shape has a mean of 50 and a standard deviation of 10.At least what percent of values are between 20 and 80?

A.89%

B.75%

C.68%

D.Cannot be determined as distribution is unknown

2)It has been found that the probability that a shopper at a grocery store will buy soda is 0.7.The probability that a shopper will buy chips is 0.5.The probability that a shopper will buy soda or chips is 0.8.What is the probability that a shopper will buy soda and chips?

A.0.1

B.0.2

C.0.3

D.0.4

3)The probability of a recession next year is 0.4.Given that there is a recession there is a 0.8 probability that QT Toys will have a reduction in profits.If there is no recession the probability of reduced profits will be 0.2.What is the probability that QT toys will see a reduction in profits?

A.0.16

B.0.28

C.0.32

D.0.44

4)27 Names have been entered into a drawing where the first prize is $500.The 2^ndprize is $250.The 3^rdprize is $100.How many different ways can these prizes be awarded?

A.80,730

B.17,550

C.421,200

D.9,687,600

5)The following is a discrete probability distribution of cars sold daily at Mt. Fuji Used Car Sales. What is the average number of cars sold at this company each day?

X Cars Sold 0 1 2 3 4 P(X) Cars Sold 0.05 0.05 0.5 0.3 0.1