B={x|x is an even whole no less than 9}
Now
Answer:
Add all the values up and then divide by 2
Step-by-step explanation:
Here we have to find the probability 
. Now express the probability in terms of standard normal cumulative distribution function. That is 
.
Now you can look up the probability from the standard normal tables. Its value is
It would be 31+t.
Unless there's more to this question.
Found this on google to help you out but it states “ Find the first derivative of a function f(x) and find the critical numbers. Then, find the second derivative of a function f(x) and put the critical numbers. If the value is negative, the function has relative maxima at that point, if the value is positive, the function has relative maxima at that point.”
