Question

The prices on many of the cafeteria food change during the year. Elvira finds that she has order veggie burgers four times and paid $78,$72,$87, and $90 on the orders. To stay within budget, she needs to be sure her average order of veggie burgers is not more than $82. How much can she spend on the fifth order to keep the average within her budget ?

Answer 1

Elvira already spent $ (78+72+87+90)=$327 on the four orders. The average is $82 so the average is 82x5 =410 . So she has 410-327=83 to spend .
Elvira can spend $83 to keep the average not more than $82