Posted by jimmy on .
this is to mathmate...this is jimmy and you answered by questions on random sample and probability (better business bureau question)..i greatly appreciate your help but i do not understand part b and d answers..i am totally lost on this whole question

statistics 
MathMate,
Please find response in original post which makes it for other readers to follow.
http://www.jiskha.com/display.cgi?id=1342991495