A manager samples receipts of every fifth person in line. Out of 50people, 4 had a mispriced item. If 600 people go to the store eachday, how many can you expect to have a mispriced item?

Out of 50 people, 4 had a mispriced item.
For every 50 people, there are 4 mispriced item.
So in 600 people, which is 600/50 = 12 times more.
The number of mispriced item is 12 x 4 = 48.
ANSWER :
48 mispriced items