Answer:
And we want to find the following probability:
And for this case we can use the cumulative distribution given by:
And for this case if we use this formula and the complement rule we have:
Step-by-step explanation:
Let X the random variable who represent the pizza delivery time and we know that the distribution for x is given by:
And we want to find the following probability:
And for this case we can use the cumulative distribution given by:
And for this case if we use this formula and the complement rule we have: