<p>pg. 461 number 7
diagram is a little hard to draw</p>
<p>a,b,c = 1
d,e,f = 2</p>
<p>it doesn’t matter what value you assign them as long as d,e,f is twice as big as a,b,c because the proportion will always be the same (1:2)</p>
<p>so P(f)=2/(2<em>3+1</em>3)=2/9</p>