Where N = number of different ice cream flavors and 2 is the number of different cones
The number of two scoop combinations, if scoop one vanilla and scoop two chocolate is considered different from scoop one chocolate and scoop two vanilla: N*N*2.
The number of two scoop combinations, if scoop one vanilla and scoop two chocolate is considered the same as scoop one chocolate and scoop two vanilla: N*N*2 – N * (N – 1)
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