Answer:
They sold 576 chocolate shakes.
Step-by-step explanation:
Ratio of chocolate to vanilla being 6:9.
This means for each 6 + 9 = 15 shakes sold, 6 were of chocolate and 9 were of vanilla.
How many chocolate shakes did they sell?
Using proportions
6 chocolate - 15 shakes
x chocolate - 1440 shakes
They sold 576 chocolate shakes.
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