Laptop buyers can pay their purchases in cash, or using a credit card, or a debit card. The manager observed that55% of the shoppers used credit cards, 15% paid in cash, and the rest paid with their debit cards.a. Write the sample space:b. Assign the probability for each sample space.

Anna owns a small business selling used books. She knows that in the last week 29 customers paid cash, 26 customers used a debit card, and 62 customers used a credit card.Based on these results, express the probability that the next customer will pay with cash as a percent to the nearest whole number.

Layla owns a small business selling clothing. She knows that in the last week 52 customers paid cash, 20 customers used a debit card, and 11 customers used a credit card.Based on these results, express the probability that the next customer will pay with something other than a credit card as a decimal to the nearest hundredth.

A department store has determined that 25% of all their sales are credit sales.  A random sample of 60 sales is selected.  The probability that the sample proportion will be less than 0.3 is                           .

Alexander owns a small business selling used books. He knows that in the last week 70 customers paid cash, 3 customers used a debit card, and 39 customers used a credit card.If next week, he is expecting 500 customers, about how many would you expect to pay with a debit card? Round your answer to the nearest whole number.

In a bank an average of 5 out of every 10 customers ask for opening a new account. A random sample of 20 customers is selected. Calculate the probability that exact 7 customers ask for opening a new account. Round your answer four decimal places.