Question

Alang owns a small business selling ice-cream. He knows that in the last week 62

customers paid cash, 60 customers used a debit card, and 2 customers used a credit
card.
If next week, he is expecting 1000 customers, about how many would you expect to
pay with a credit card? Round your answer to the nearest whole number.

Answer 1

Explanation:

last week there were

62 + 60 + 2 = 124 customers.

that means that the fraction of the customers, who paid by credit card, was

2/124 = 1/62

in situations like that, when we use history data and try to predict future behavior, we use that past experience and extrapolate to a predicted result.

we simply say that we expect the same fraction, 1/62, if customers to use credit cards.

for the absolute number of predicted credit card customers we multiply the predicted number of customers by the expected fraction

1000 × 1/62 = 500/31 = 16.12903226... ≈ 16

so, he expects 16 credit card customers.