Question

Lesson 6.02: Finn's fish store has 5 tanks of goldfish; each tank holds 40 fish. He collects andinspects 5 fish from each tank and finds that 4 fish have fin rot. Find the estimated numbergoldfish in the store that have fin rot. SHOW ALL WORK!

Answer 1

Explanation:

We are told that of each 5 fish inspected in the tank, 4 have fin rot, therefore, the probability o getting a fin rot is

`(4)/(5)*100\%=80\%`

This means 80% of the fish in a tank have fin rot.

Now, for one tank 80% of 40 fish is

`(80\%)/(100\%)*40=32`

Now, since there are 5 fish tanks in the store and 32 fish in each have fin rot; therefore, the total number of fish that have fin rot will be

`32fish*5=160\text{fish}`

Hence, the estimated number of fish with fish rot in the store is 160.