Question

92 people had lunch in the cafeteria.

9 people had soup, a sandwich, and a drink. 33
people had soup, 45 had a sandwich, and 52
had a drink. 5 people had soup and a
sandwich. 10 people had a sandwich and a
drink. 5 people had soup and a drink.
How many people had only a drink?
14 people
28 people
21 people
92 people

Answer 1

Explanation:

The question about how many people ONLY had a drink is asking to solve some simultaneous equations . Know this?

People = 92

soup = SP = 33

sandwich = SW = 45

drink = D = 52

9(SP+SW+D)

5(SP+SW)

10(SW+D)

5(SP+D)

for a drink 9+10+5 people had a drink with something else

24 had a drink with something else so 52-24=28 only had a drink

28 people only had a drink