Question

Autumn owns a small business selling ice-cream. She knows that in the last week 108 customers paid cash, 8 customers used a debit card, and 4 customers used a credit card.
If next week, she is expecting 1800 customers, about how many would you expect to pay with a debit card? Round your answer to the nearest whole number.

Answer 1

Last week debit card share = 8 / (108 + 8 + 4) = 8/120 = 1/15.
Expected debit users = 1800 × (1/15) = 120.

So about 120 customers.