A store analyzed its most recent sales. The following table provides probabilities calculated from the collected data: Cash Credit Card Debit Card Spent less than $20 0.09 0.03 0.04 Spent between $20 and $100 0.05 0.21 0.18 Spent more than $100 0.03 0.23 0.14 a. What proportion of sales was paid using a debit card? b. Find the probability that a credit card purchase was more than $100. c. Determine the proportion of purchases made by a credit card or a debit card.
A store analyzed its most recent sales. The following table provides probabilities calculated from the collected data:
| Cash | Credit Card | Debit Card | |
| Spent less than $20 | 0.09 | 0.03 | 0.04 |
| Spent between $20 and $100 | 0.05 | 0.21 | 0.18 |
| Spent more than $100 | 0.03 | 0.23 | 0.14 |
a. What proportion of sales was paid using a debit card?
b. Find the
c. Determine the proportion of purchases made by a credit card or a debit card.
d. Find the proportion of purchases made using a credit card and less than $20 spent.
e. For purchases of more than $100, what is the probability that the customer used a credit card?
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