How many total people ordered hamburgers in one hour?

Question

gabylovesyou · Answer

attachment

gabylovesyou · Answer

53!!!!!!!!!!!!!!!!!!!!!! Correcto mundo????????? @Hero

anonymous · Answer

oui

hero · Answer

You can't just add all of the numbers up like that. It doesn't work that way.

anonymous · Answer

why not?

gabylovesyou · Answer

?

anonymous · Answer

53 ordered burgers in one hour
15 without cheese or pickles
8 with both cheese and pickles
20 with cheese and no pickles
10 with pickles and no cheese 
$$15+8+20+10=53$$

hero · Answer

I guess. This stuff gets confusing sometimes.

anonymous · Answer

you might have been referring to adding the middle up twice is my guess

gabylovesyou · Answer

lol so it is 53

anonymous · Answer

yes, it is 53

hero · Answer

I could have sworn you were supposed to subtract the innermost number

hero · Answer

No, I wasn't thinking about adding the middle number twice. You're so silly @satellite73

gabylovesyou · Answer

do i have to ??? @Hero

anonymous · Answer

well actually that is a very common mistake
since 28 had cheese and 18 had pickles, without the diagram it is tempting to add them, forgetting that you are adding those that had both twice

anonymous · Answer

@Gabylovesyou  you have the right answer don't think about it any more

hero · Answer

Why would anyone add 8 twice? Are you making this up @satellite73?

gabylovesyou · Answer

ok.. thanks :)

anonymous · Answer

oh no, not at all

anonymous · Answer

i am saying IF you did NOT have the diagram, but were just given some figures, it is a common error