Question 868442
1. what is the probability that is defective? {{{.02*.35 + .03*.40 + .01*.25}}}
 2.what is the probability that is not defective? {{{1 -.02*.35 + .03*.40 + .01*.25}}} 0r {{{(.98*.35 + .97*.40 + .99*.25)}}}
 3.if product is defective,what is the probability it was made by machine b3?
 {{{(.01*.25)/(.02*.35 + .03*.40 + .01*.25)}}}
 3.if product is not defective,what is the probability it was made by machine b1?
 {{{(.98*.35)/(.98*.35 + .97*.40 + .99*.25)}}}