Question

An unbiased coin is tossed four times. Find the probability of the given event. (Round your answer to four decimal places.)
The coin lands heads more than once.

Answer 1

more than once means two times, three times or four times
the probabilities we can find via the fourth line of pascals triangle
\[1, 4, 6, 4, 1\] the denominator will be \(2^4=16\) so your probabilities are
\[\frac{6}{16},\frac{4}{16}, \frac{1}{16}\] for two, three or four heads respectively
add these up