NEW QUESTION Mr. and Mrs. Doran have a genetic history such that the probability that a child being born to them with a certain trait is 28%. If they have seven children, what is the probability that at most one of their seven children will have that trait? Round your answer to the nearest thousandth.

1 answer

interpretation:
"most one of their seven children"
to me means, 4, 5, 6, or 7 children
do it the same way I just used in your previous post

or

exclude case of 0, 1, 2, or 3 children with the trait,
that is, subtract that sum from 1
(actually more steps than my first method)