prompt: P(red)>P(white)
st(1) r/(b+w)> w/(b+r) implies given b is fixed parameter, the relationship of r/w and w/r will be as following r/w > w/r.
Example b=1,r=2,w=3 ---> 2/(1+3)<3/(1+2), 2/4<1 and 2<3 or applying the same to r and w, r<w
In our case, it's opposite since r/w > w/r and r>w
Sufficient to answer Yes
st(2) b-w>r implies only b>r+w which is again not explicit for our knowing about r and w individual values. Not Sufficient
a
dreamv wrote: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 probability that the marble chosen will be white ?
1) r/(b+w)> w/(b+r)
2) b-w > r
