Question 1130744
Use 1000 shirts A======B======C======total
non-def---------480----294---198----972
def--------------20------6----2------28
Total           500----300---200---1000

percentage defective is 2.8%, or 28/1000
Also 4%(.5)+2%(.3)+1%(.2)

if defective, from line would be 6/28 or 21.4%