A towel has a repeating pattern of 2 green stripes, then 3 blue stripes, and 1 yellow stripe. If the towel has 20 stripes altogether, how many blue stripes are on it?
If there is 20 stripes total, that means that the pattern can go through the a full cycle (2 green stripes, 3 blue stripes, and 1 yellow stripe) 3 times. Making that 3 blue stripes x 3 times through the cycle. Which means 9 blue stripes.