30 Dark Chocolates
25 Milk Chocolates
Number of candy per box = 20
Number of boxes = 80
Total number of candies = 80 x 20 = 1600
Number of Taffy = 20/100 x 1600 = 320
Rest of the lot is 1600 - 320 = 1280
So if he picks 1280 candies, there is a possibility that it doesn't include a Taffy!
But... if he picks 1281 candies, there must be atleast 1 Taffy in it!
So ans: 1281
Yes, but the question say: What is the maximum number of candy pieces a quality control inspector can open before
coming across a taffy candy. - This number is 1280 in my eyes.
You want somethin', go get it. Period!