Answer:
Step-by-step explanation:
the problem is, there is no problem ;)
I hope i dont any mistake :p tell me if u dont understand :)
Answer:

And we can find this probability with the complement rule:

Step-by-step explanation:
For this case we define the random variable X ="driving distance for the top 100 golfers on the PGA tour" and we know that:

And for this case the probability density function is given by:

And the cumulative distribution function is given by:

And we want to find this probability:

And we can find this probability with the complement rule:

the answer is 16 because .80 times 20 is 16