The amount of time you have to wait at a particular stoplight is uniformly distributed between zero and 3 minutes. 50 percent of the time, the stoplight will change before you have to wait X seconds, what is the value of X?

Question

satellite73 · Answer

whatever is half way between 0 minute and 3 minutes (in seconds)

rockamring2016 · Answer

A) 30 seconds	B) 96 seconds	C) 24 seconds	D) 90 seconds E) None of the above I know the answer is 90 seconds but have no idea to solve it..

satellite73 · Answer

common sense 
50% is half

satellite73 · Answer

half way between 0 and 3 minutes (or 0 seconds and 180 seconds) is 90 seconds

rockamring2016 · Answer

ohh.. it was that easy!! I thought I have to use some formula!! haha thanks!! will medal and fans!

satellite73 · Answer

yes, it is that easy, not sure what formula you could use
yw

rockamring2016 · Answer

like formula sheet that my prof gave and its over 20 of them so.... lol