A fisherman’s day is rated as good if he catches 9 fishes, fair if 7 fishes and bad if 5 fishes. He catches 53 fishes in a week and had all good, fair and bad ratings in the week. So how many good, fair and bad ratings days did the fisherman had in the week?
4 days with good ratings, 1 day with fair rating and 2 days with bad rating.
With that rating, he has to catch: 4×9 + 1×7 + 2×5 = 53 fishes.