Hey. this is on the Kaplan book page 135

A vending machine dispenses gumballs in a regularly repeating cycle of 10 different colors. If a quarter buys 3 gumballs, what is the minimum amount of money that must be spent before 3 gumballs of the same color are dispensed?

The correct answer is 1.75

Instead of labeling all the colors, is there a faster way?

Thanks!