# Question

The accompanying table shows, for credit-card holders with one to three cards, the joint probabilities for number of cards owned (X) and number of credit purchases made in a week (Y).

a. For a randomly chosen person from this group, what is the probability distribution for number of purchases made in a week?

b. For a person in this group who has three cards, what is the probability distribution for number of purchases made in a week?

c. Are number of cards owned and number of purchases made statistically independent?

a. For a randomly chosen person from this group, what is the probability distribution for number of purchases made in a week?

b. For a person in this group who has three cards, what is the probability distribution for number of purchases made in a week?

c. Are number of cards owned and number of purchases made statistically independent?

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