Question

a coffee shop collected the following information regarding purchases from 120 of its customers. 59 purchased coffee. 40 purchased donuts. 19 purchased coffee and donuts. complete parts a) through c). a) of those surveyed, how many purchased only coffee? 40 (type a whole number.) b) of those surveyed, how many purchased only donuts? (type a whole number.)

Explanation:

Step1: Find number of only - donut buyers

The number of customers who bought donuts is 40, and 19 of them also bought coffee. To find the number of customers who bought only donuts, we subtract the number of customers who bought both from the total number of donut - buyers.
$40 - 19$

Answer:

21