A success in this situation is a strike, so and
.
Each frame represents a trial, so .
Find the probability that Carol succeeds times out of
trials :
So let .
To find this probability, find the value of the term in the expansion of
.
Where and
.
Substitute the values and
in the equation
.
.
Therefore, the probability that Carol succeeds times out of
trials is
.
The probability that Carol succeeds times out of
trials is
.