Question 505553
<pre>
The other tutor misunderstood that A,B,C, and D are the
letters on the spinner.

The conditional probability of X given Y is given by the formula:

          P(X and Y)
P(X|Y) = ------------
             P(Y) 


              P(C and not B)
P(C|not B) = --------------- 
                P(not B)

P(C and not B) = P(C) = {{{1/10}}}

P(not B) = 1 - P(B) = 1 - {{{1/5}}} = {{{5/5}}} - {{{1/5}}} = {{{4/5}}}


              P(C and not B)      {{{1/10}}}
P(C|not B) = --------------- =  -------- =  {{{1/10}}}{{{"÷"}}}{{{4/5}}} = {{{1/10}}}{{{""*""}}}{{{5/4}}} = {{{1/8}}}
                P(not B)           {{{4/5}}}


Edwin</pre>