Question 751448
X ~ Binomial(42, 0.62)
a.  P(X < 28) = {{{sum((matrix(2,1,42,x))(0.62^x)(0.38^(42 - x)),x = 0,27)}}} = {{{highlight(0.6748)}}}

b. P(X > 30) = {{{sum((matrix(2,1,42,x))(0.62^x)(0.38^(42 - x)),x = 31,42)}}} = {{{highlight(0.07567)}}}