ID Quality Control

A firm targets $20$ quality control for its products. However, they ended up with $1\mathrm{.}50$ quality control. What is the "expected number of defects" per batch size of $500$ in $1\mathrm{.}5$g quality control?

$102\mathrm{.}9$

$63\mathrm{.}3$

$133\mathrm{.}6$

O $66\mathrm{.}8$