1. 1.Ed has ordered a computer and a desk from two different stores. Both items are to be delivered on Tuesday. The probability that the computer will be delivered before noon is 0.6 and the probability that the desk will be delivered before noon is 0.8. If the probability that either the computer or the desk will be delivered before noon is 0.9, what is the probability that both will be delivered before noon? 2. Find the mean and the standard deviation: x5791113 p(x)0.550.210.120.080.04

2. Linear Problems

3. The actual shooting records of the 1992 NCAA championship final four teams showed the probability of making a 2-point basket was 0.5 and the probability of making a 3-point basket was 0.39. Since the probability of making a 2- point basket is greater than the probability of making a 3-point basket, why do coaches allow some players to shoot the 3-point shot if they have the opportunity? Use expected value to explain your answer.

4. The cost of gas is $2.89/gal. The distribution below shows the probability for the amount of gas I will need. Find the expected cost for me to fill up my car. x = #galp(x) 170.1 180.2 190.3 200.4

5. Mean of y = a + bx

6. Ex. The probability distribution for the number of tickets sold to the basketball game is shown below. Each ticket is $5. Find the expected earning from the game. x = #ticketsp(x) 1000.14 1100.23 1200.27 1300.15 1400.12 1500.09

7. The cost to rent a car is 20per day and $0.35 per mile. Find the expected cost. x=#milesp(x) 100.02 200.04 300.09 400.13 500.25 600.47 y = #daysp(y) 10.12 20.14 30.22 40.33 50.19

8. Mary makes a profit of $15 for each doll she sells at the fair. The booth costs $25. Find her expected income. x = #dollsp(x) 00.01 10.03 20.05 30.12 40.33 50.27 60.19

9. Variance of y = a + bx Relates to slope.

10. Y= 15x - 25 x = #dollsp(x) 00.01 10.03 20.05 30.12 40.33 50.27 60.19 1.Find the standard deviation of x. 2.Now find standard deviation of y.

11. A company serves homes by providing propane gas. They have two different pricing models. Model 1 is $2 per gallon. Model 2 is $50 plus $1.80 per gallon. Which is the best deal? x (#Gal)p(x) 3150.05 3160.1 3170.15 3180.27 3190.35 3200.08