Posted by Erica on .
The production process of computer parts uses two machines one old & one new. If the old machine is used the probability that the defected part is produced is .13 if the new machine is used the probability that the defective part is produced is .04. moreover, the new machine produces parts 4 times as fast as the old machine does.
I am trying to draw a tree diagram to represent the above probabilities. I can't figure out what the .13 and .04 would be over?

Statistics 
Murad,
Ali pays Rs. 855 property tax.What is the assesed value of his home, if the tax rate in his locality is 2.5% ?