Question 942788
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Four persons are to be chosen at random from a group containing 3 men 2 woman
and 4 children. Find the chance that exactly two of them are children.
<pre>
{{{

((matrix(1,4,

4,children, CHOOSE, 2))*(matrix(1,4,

5,adults, CHOOSE, 2)))/
matrix(1,4,

9,persons, CHOOSE, 4)}}}{{{"=""}}}{{{((4C2)(5C2))/(9C4)}}}{{{""=""}}}{{{((6)(10))/120}}}{{{""=""}}}{{{1/2}}}.

Edwin</pre>