Question 1075084
{{{P(X)=C(6,X)*(0.5)^X*(0.5)^(6-X)=C(6,X)*(0.5)^6=C(6,X)/64}}}
So,
{{{P(3<=X<=6)=(C(6,3)+C(6,4)+C(6,5)+C(6,6))/64}}}
{{{P(3<=X<=6)=(20+15+6+1)/64}}}
{{{P(3<=X<=6)=42/64}}}
{{{P(3<=X<=6)=21/32}}}