[問題]新pp問題1

[mht]

請教大家!真心感謝~(一題po一篇囉)
1. A certain jar contains only "b" black marbles,"w"white marbles, and "r" red marbles. If one marble is to be chosen at random from the jar, is the probability that the marble chosen will be red greater than the probility that the marble chosen will be white?

(1) r/b+w >w/b+r

(2)b-w > r

Ans. A