Question 878804
p(winner) = 3/12= .25,   n = 5
P(x ≤ 1) = binomcdf(5, .25, 1) = .6328
0r Using {{{P (x)= highlight_green(nCx)(p^x)(q)^(n-x) }}} 
P(x ≤ 1) = P(0) + P(1) = (.75)^5 + 5C1(.25)^1(.75)^4
{{{nCx = (n!)/x!(n - x)!)}}}