Suppose there are 100 cookies in a jar. if 30 are chocolate chip, 40 are oatmeal raisin, 20 are peanut butter, and 10 are sugar cookies, what are the odds of randomly selecting either an oatmeal raisin or sugar cookie from the jar?
If there's 100 cookies, of which there are 40 oatmeal raisin and 10 sugar cookies, there are 50 out of 100 cookies which you want. Hence by chance, there is a 50/100, or 1 in 2 chance of you obtaining an oatmeal raisin or a sugar cookie.
