Posted by j on .
The diameters of ball bearings produced in a manufacturing process can be described using a uniform distribution over the interval 2.5 to 8.5 millimeters. What is the probability that a randomly selected ball bearing has a diameter less than 4.5 millimeters?
a.0.38, b.0.28, c.0.43, d.0.33

math 
anaavu,
The diameter can be 2.5mm to 8.5mm. There is 6mm of difference. But our target is the ones less than 4.5mm, which is 2mm of difference. Our probability is 2/6 which is the same as 33 percent or .33.
It's a little complicated, sorry I'm not great at explaining things. Do you get it now?