Question 473886
{{{mu = sigma^2 = 3.8*18 = 68.4}}}
==> {{{sigma = sqrt(68.4) = 8.3}}}

==> The probability of more than 72 strokes in an 18-hole = {{{1-e^(-68.4)*sum(68.4^x/x!, x = 0, 72)}}}.