Bunuel
12 Days of Christmas 2024 - 2025 Competition with $40,000 of Prizes
A bakery produces an average of 170 cupcakes per day for 5 days and x cupcakes per day for the next y days. The bakery’s overall average production is 200 cupcakes per day for the entire 5 + y day period.
Select for
x the value of x and for
y the value of y that would be jointly consistent with the given information. Make only two selections, one in each column.
- Average production for the first 5 days: 170 cupcakes/day.
- Total production for the first 5 days = 5×170= 850
- Average production over 5+y days: 200 cupcakes/day.
- Total production over 5+y days = 200×(5+y)
- Production during the next y days: x cupcakes/day.
- Total production for these y days = xy.
The total production over 5+y days can also be expressed as:
Total production=Production for first 5 days + Production for next y days.
Substitute the values:
200×(5+y)=850+xy
Simplify:
1000+200y=850+xy
Rearrange:
xy-200y=150
y(x-200)=150
Now x>200 for the equation to be positive overall, since y, i.e., number of days will always be positive
Lets try the options
when x=215, y=10
when x=250, y=3 (however, 3 is not an option choice)
Therefore,
x=215, y=10 is the correct solution