The baker will have some cupcakes left over.
Here's why: if you have 10 platters, 80 chocolate cupcakes and 72 vanilla cupcakes. Your goal is to put the same number of vanilla cupcakes and the same number of chocolate cupcakes on each platter. 80 ÷ 10 = 8 chocolate cupcakes per platter. 72 ÷ 10 = 7.2 vanilla cupcakes per platter, and assuming you don't want to cut up to cupcakes into fifths, you'll have 2 vanilla cupcakes left over.