2. A recent survey of a gas-station's customers showed that 68% paid with credit cards, 29%...

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2. A recent survey of a gas-station's customers showed that 68% paid with credit cards, 29% used debit cards, and only 3% paid with cash. During her eight-hour shift as cashier at this gas station, Serena had a total of 223 customer. What is the probability that... a. at least 142 customers used a credit card? b. fewer than 220 customers paid with credit or debit cards 2. A recent survey of a gas-station's customers showed that 68% paid with credit cards, 29% used debit cards, and only 3% paid with cash. During her eight-hour shift as cashier at this gas station, Serena had a total of 223 customer. What is the probability that... a. at least 142 customers used a credit card? b. fewer than 220 customers paid with credit or debit cards

Answer rating: 100% (QA)

a To calculate the probability that at least 142 customers used a credit card we need to calculate t... View the full answer