According to government data, about 78% of U.S. households have an automatic dishwasher. If 15 households are selected at random, what is the probability that 9 of them have an automatic dishwasher? Enter your answer using three decimal places.

We compute the probability using binomial law like this:
[tex]C_{15}^90.78^9(1-0.78)^6=\dfrac{15!}{9!(15-9)!}0.78^9(1-0.78)^6\\\approx0.06\text{ (use a calculator in order to evaluate the expression )}[/tex]