The total flowers is 4 + 3 + 4 = 11
4 roses + 3 carnations = 7
Probability of picking either a rose or a carnation = 7/11

all we can really cancel is one of the (x-5) and the "x", is all.
If there is one sheep for every 2 goats then that means there are 400 goats and 200 sheep.