Question 1159630


=====ok=======wrong====total
A-----297----------3---------300
B-----380---------20---------400
C-----291----------9---------300
Tot---968---------32--------1000

a. 3.2% probability of a mistake
b. 3/32 or 9.375% it is due to A.
c. B and C have 29 mistakes in 671 orders or 4.32%