Question 842040


Without choosing yellow the possible choices are
RR: {{{(6/16)(5/15)=(3/8)(1/5)=3/40}}}
WW: {{{(8/16)(7/15)=(1/2)(7/15)=7/30}}}
RW: {{{(6/16)(5/15)=(3/8)(1/3)=1/8}}}
WR: {{{(8/16)(6/15)=(1/2)(2/5)=1/5}}}
So then the probabilities add to,
{{{P=3/40+7/30+1/8+1/5=9/120+28/120+15/120+24/120=76/120=19/30}}}