Question 1040907
Assume she makes the next X shots, this would be the minimum number of shots she'd have to take.
Calculate the percentage of shots made,
{{{(4+X)/(15+X)>=60/100=3/5}}}
{{{5(4+X)>=3(15+X)}}}
{{{20+5X>=45+3X}}}
{{{2X>=25}}}
{{{X>=25/2}}}
Since the number of free throws is an integer, use the next largest integer.
{{{X=13}}}