Probability DS

T = G + R (total = green + red)

P(both green) = P(1st green)*P(2nd green)

=(G/T)*((G-1)/(T-1))

Notice that both statements give exactly the same info, so choices A, B and C are out. So we work with one statement alone and decide between D and E.

G/T = 1/5
However, (G-1)/(T-1) depends on what the exact values are, which we don't know. Therefore choose E.

-BM-

Both statements give us the same ration 4X red and X Green

Lets say if there are 5 chips: 4 red and 1 green well we can not even GET two green so PROP = 0

Or lets say we have 400 red and 100 green and now the prob is not zero.

Choose E