Math in Daily Life: Breakfast Restaurant Cashier
I own a restaurant. At breakfast today I have 150 customers. On my cash register, there are records of the orders made today. The screen is cracked, and I need to figure out what is listed in the cracked part of the screen. The screen shows that:
Eggs ordered: x
Bacon ordered: y
PBJ ordered: z
Eggs and bacon ordered: 40
Eggs and PBJ ordered: 20
Bacon and PBJ ordered: 25
Eggs, bacon, and PBJ ordered: 10
What is x+y+z?
The answer is 225.
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1 solution
Using P.I.E. 150 = x+y+z – 40 – 20 – 25 + 10. So x+y+z = 225