SOLUTION: I am having problems figuring out where to even start with the following, even just a hit would be appreciated. ABC Car Rental Company determined that the distance traveled per

Question 909170: I am having problems figuring out where to even start with the following, even just a hit would be appreciated.
ABC Car Rental Company determined that the distance traveled per car per year is normally
distributed, with a standard deviation of 645 miles. If 12% of the cars travel more than
55,000 miles, what is the mean distance traveled per year?

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
88% ≤ 55,000
X the mean distance traveled per year
z = invNorm(.88) = (55,000 - X)/645
645invNorm(.88) = 55,000 - X
X = 55,000 - 645invNorm(.88)
X = 55,000 - 645(1.175) = 54,242.125, the mean distance traveled per year
RELATED QUESTIONS
I am having problems figuring out where to even start with the following, even just a hit (answered by ewatrrr)

I am having problems figuring out where to even start with the following, even just a hit (answered by ewatrrr)

I am having problems figuring out where to even start with the following, even just a... (answered by ewatrrr)

Solve by elimination 5x + 5y = -7 7x - 2y = 19 If all work could be shown (even... (answered by jorel1380,stanbon)

i have the following 3x3 matrix 1,2,-1 2,1,4 = A 1,-2,1 i need to evaluate A^2... (answered by actuary)

I am having problems figuring out linear equations i dont really know where to start... (answered by checkley79)

The instructions say: Draw the graph of the following linear function. The function... (answered by stanbon)

In class we had to figure out how to solve problems bu using solving the sub-problem of... (answered by solver91311)

I can't figure out where to even start with this problem. Any help would be greatly... (answered by lwsshak3)