Question 929674
{{{P(1B)=5/9}}}
{{{P(2B)=4/8=1/2}}}
{{{P(3B)=3/7}}}
{{{P(4B)=2/6=1/3}}}
So then,
{{{P(BBBB)=(5/9)(1/2)(3/7)(1/3)}}}
{{{P(BBBB)=5/126}}}