Question

A copier cost $200 for each repair call, after 3 calls they are free (For example 1 call= $200, 3 or more calls = $600). The following chart shows the probability of how many repair calls you will have in 1 year. Questions 36-37

pls show work

# Repairs	0	1	2	3 or more
Probability	0.30	0.41	0.20	0.10

36. What is the expected repair call costs for 1 year?

1. $150.00

2. $200.00

3. $206.00

4. $220.00

5. $300.00

37. What is the probability that one repair call cost will be more than $200 for 1 year?

1. .70

2. .40

3. .30

4. .20

5. .10

38. The daily high temperature of Los Angeles in the month of December is normally distributed with a mean of 58 degrees Fahrenheit and a standard deviation of 2 degrees fahrenheit. What percent of high temperatures are between 60 and 64?

1. 68%

2. 84%

3. 15.85%

4. 16%

5. None of the above

39. If P(A) = 0.38, P(B) = 0.83, and P (A ∩ B) = 0.57; then P(A U B) =

1. 1.21

2. 0.64

3. 0.78

4. 1.78

5. None of the above

Answer 1

36. What is the expected repair call costs for 1 year?

Answer: $220.00

37. What is the probability that one repair call cost will be more than $200 for 1 year?

Answer: 0.30

38. The daily high temperature of Los Angeles in the month of December is normally distributed with a mean of 58 degrees Fahrenheit and a standard deviation of 2 degrees Fahrenheit. What percent of high temperatures are between 60 and 64?

Answer: 15.85%

39. If P(A) = 0.38, P(B) = 0.83, and P (A ∩ B) = 0.57; then P(A U B) =

Answer: 0.64