Example 1. Twenty-five consumers were surveyed about their preferred brand
of soap. It was found out that 15 of them selected the local brand, 11 for the
imported brand, and 5 for both brands.
a. How many preferred local brands only?
b. How many preferred imported brands only?
c. How many do not use any of the brands?
14
Answers & Comments
Answer:
a. 15 b.11 c.14
Step-by-step explanation:
c. 26
+ 5
------------
31
- 25
-----------
14