Question 849979
There are only three possibilities : on time, early, or late.
{{{P(early)+P(on_time)+P(late)=1}}}
{{{(5/13)+(3/8)+P(late)=1}}}
{{{P(late)=104/104-40/104-15/104}}}
{{{P(late)=(104-40-15)/104}}}
{{{P(late)=49/104}}}