Question

A total of 100 students were surveyed

and asked which color they would like
in the school flag.
5 checked only green.
8 checked only red.
12 checked only blue.
19 checked red and green,
22 checked blue and greer!.
13 checked red and blue.
How many checked all 3 colors?

Answer 1

21

Explanation:

5+8+12+19+22+13= 79 , 100 students - 79 checked students = 21