Question 1044687
===Defective=====non-defective====Total
A-----6--------------294-----------300
B-----6--------------194-----------200
C----20--------------480-----------500
Tot---32-------------968-----------1000
Probability of a defective item chosen at random is 3.2%
If an item is defective (n=32) probability it was made in factory B is 6/32 or 18.8%