Question 315134
9 B, blue
5 Y, yellow
7 R, red
21 total
P(B)={{{9/21=3/7}}}
P(Y)={{{5/21}}}
P(R)={{{7/21=1/3}}}
P(B,R,Y)=P(B)P(R)P(Y)={{{(3/7)(1/3)(5/21)=5/147}}}