$p(x)=\frac{1}{9}(x-1)$, $x=2,3,4,5$. Why can this function not be a p.m.f?
$f(x)=\frac{2}{3}(x-3)$, $2\leq x\leq5$ Why can this function not be a p.d.f?
$p(x)=\frac{1}{9}(x-1)$, $x=2,3,4,5$. Why can this function not be a p.m.f?
$f(x)=\frac{2}{3}(x-3)$, $2\leq x\leq5$ Why can this function not be a p.d.f?