Probability, How do you set this up using probability distribution table?

If the probability distribution for the random variable X is given in the table, what is the expected value of X?

Probability, Selection.

A 4 person grievance committee is to be composed of employees in 2 departments, A and B, with 15 and 20 employees, respectively. If the 4 people are selected at random from the 35 employees, what is the probability of selecting: A. 3 from A and 1 from B? B. 2 from A and 2 from B? C. All from A? D. At least 3 from A?

In a game of dice, find the expected value.

On three rolls of a single die you will lose $10 if a 5 turns up at least once, and you will win $7 otherwise. What is the expected value of the game?

Markov Chain, properties

All welders in a factory begin as apprentices. Every year the performance of each apprentice is reviewed. Past records indicate that after each review, 10% of the apprentices are promoted to professional welder, 20% are terminated for unsatisfactory performance, and the remainder continue as apprentices. A. Draw a transition diagram.(?) B. Write the transition matrix. C. What is the probability that an apprentice is promoted to professional welder within 2 years? Within 4 years?

Mathematics of Finance

A printer was purchased for $1200 and has a salvage value of $100. If it is expected to produce a 150,000 copies, a) what is the unit depreciation for the ptinter? b) if it has printed 12,000 copies the first year, what is the year end depreciation? * do not round off in the middle of the problem