Question

In a group of 50 patrons, 8 patrons like lattes and espressos, 12 patrons like espressos and cappuccinos, 9 patrons like lattes and cappuccinos, and 5 patrons like all 3 coffee drinks. Altogether, 20 patrons like lattes, 28 patrons like espressos, and 19 patrons like cappuccinos. How many patrons don't like any of these coffee drinks?

Answer 1

a. 4
b. 7
c. 9
d. 3

Answer 2

Familiar with inclusion-exclusion principle ?

https://en.m.wikipedia.org/wiki/Inclusion –exclusion_principle

Answer 3

I'm not

Answer 4

is it 7?

Answer 5

That was my guess, but why

Answer 6

i;m sure qualified helpers will explain

Answer 7

Pls go ahead sparrow
Right now I'm on mobile