Please show me how to solve this problem:
For? credit-card holders with one to three? cards, the joint probabilities for the number of cards owned? (X) and number of credit purchases made in a week? (Y)
Cards(Y) 0 - 1 - 2 - 3 - 4
(X)
1 - 0.06, 0.12, 0.08, 0.06, 0.04
2 - 0.02, 0.07, 0.09, 0.08, 0.07
3 - 0.01, 0.04, 0.06, 0.08, 0.12
For a person in this group who has three? cards, what is the probability distribution for number of purchases made in a? week?
Number of Purchases in Week? (Y)
0- 1 - 2 - 3 - 4
?(X) = - = - = - = - =
Round 2 decimals places as needed