We have 16 outcomes, helpfully listed
RR BB YY GG
RB BR RY YR
RG GR BY YB
BG GB YG GY
Counting Gs, that's
0 0 0 2
0 0 0 0
1 1 0 0
1 1 1 1
So out of 16, 9 have 0 G, 6 have 1 G and 1 has 2 G.
Those are corresponding probabilities
P(n=0)=9/16= .5626
P(n=1)=6/16 = .375
P(n=2)=1/16=.0625
Answer: Second graph, which is the bottom one of the second figure
