I need help right away with this statistics questions. Please I need someone really good. Do not mess up! Thanks

1. the following probability distribution was subjectively assessed for the number of sales a salesperson would make if they made five sales calls in one day. Sales Probability 0 0.10 1 0.15 2 0.20 3 0.30 4 0.20 5 0.05 What is the Probability that the number of sales is 2 or 3? ( Show Work) 2. In a study by peter d. hart research associates for the Nasdaq stock market, it was determined that 20% of all stock investors are retired people. Suppose a Random sample of 9 stock investors is taken. a. What is the probability that exactly four are retired people? (round your answer to three decimal places) b. How many retired people would expect (mean) to find in a random sample of 9 stock investors? 3. if x, the time (in minutes) to complete an oil change job at certain auto service station, is uniformly distributed over the interval 20 to 30, then what is the probability that an oil change job is completed in less than 27 minutes? ( Show work)

8. Consider the following 3x4 contingency table in which a sample of 1400 companies is summarized in terms of the companys industry type (X, Y, or Z) and geographic location (A, B, C, or D).

A	B	C	D
X	124	110	108	114
Y	130	106	122	112
Z	128	118	112	116

What is the probability P (CY)? [Round your answer to four decimal places]