Question 1184148


P(D = 0|B = 0) = {{{0.1/(3/10)  = 1/3}}}
P(D = 1|B = 0) = {{{0.15/(3/10)  = 1/2}}}
P(D = 2|B = 0) = {{{0.05/(3/10)  = 1/6}}}


===> E[D| B = 0] = {{{0*(1/3) + 1*(1/2) + 2*(1/6) = highlight(5/6)}}}.