A fisherman's day is rated as good if he catches 9 fishes, fair if he catches 7 fishes and poor if he catches 5 fishes. The fisherman catches 53 fishes in a week that includes good, fair and poor days. How many good days the fisherman had during the week? Choose the correct choice from the following:
A) 1
B) 2
C) 3
D) 4
E) 5
Good=9 fish on a days   Fair =7 fish on b days   Poor=5 fish on c days   9a+7b+5c=53   a+b+c=7   a=3   ANSWER:3
<result>C</result>
A fisherman's day is rated as good if he catches 9 fishes, fair if he catches 7 fishes and poor if he catches 5 fishes. The fisherman catches 53 fishes in a week that includes good, fair and poor days. How many good days the fisherman had during the week?