Question 529446
X~Binomial(3,0.5)

a) P(X=2) + P(X=3) = {{{( matrix( 2, 1, 3, 2 ))(0.5^3)+( matrix( 2, 1, 3, 3 ))(0.5^3)}}} = {{{highlight(0.5)}}}

b)P(X=0) + P(X=1) = {{{( matrix( 2, 1, 3, 0 ))(0.5^3)+( matrix( 2, 1, 3, 1 ))(0.5^3)}}} = {{{highlight(0.5)}}}