The number of computers sold by a small store in one day is a random variable X with the distribution of:
P(0)=0.5 P(1)=0.3 P(2)=0.2
If a customer buys a computer, he may also buy a printer with probability of 0.4. Assume that a customer does not buy more than one printer with one computer. the number of printers sold by the store in one day is random variable Y.
1) Find the joint PMF of (X,Y)
2)Find the marginal PMF of X and Y
3)Suppose computers are sold at $600 a piece, and printers are sold at $120 a piece. Find the probability distribution of the total sale T at the store from

Question

The number of computers sold by a small store in one day is a random variable X with the distribution of:
P(0)=0.5 P(1)=0.3 P(2)=0.2
If a customer buys a computer, he may also buy a printer with probability of 0.4. Assume that a customer does not buy more than one printer with one computer. the number of printers sold by the store in one day is random variable Y.
1) Find the joint PMF of (X,Y)
2)Find the marginal PMF of X and Y
3)Suppose computers are sold at $600 a piece, and printers are sold at $120 a piece. Find the probability distribution of the total sale T at the store from

anonymous · Answer

computers and printers during one day.