Please help! I have a test and a teacher that cant teach.
Suppose a biologist captured and tagged 15 fish from a lake. The
tagged fish were released back into the lake. A sample was taken
some time later. In that sample there were 800 fish and only 5
were tagged. Predict how many fish in total are in the lake.

Question

Please help! I have a test and a teacher that cant teach.
Suppose a biologist captured and tagged 15 fish from a lake. The
tagged fish were released back into the lake. A sample was taken
some time later. In that sample there were 800 fish and only 5
were tagged. Predict how many fish in total are in the lake.

giitter · Answer

Im sorry we do not answer test questions only homework questions

giitter · Answer

I truly am sorry

emilyngiron · Answer

this isnt the actual test. its supposed to prepare me but my teacher doesnt teach us anything. he barely speaks english.

emilyngiron · Answer

@GIitter

giitter · Answer

Aww

giitter · Answer

hang on

dumbcow · Answer

Use a proportion:
$$\frac{sample -total}{sample -tagged} = \frac{total}{total-tagged}$$
$$\frac{800}{5} = \frac{x}{15}$$
$$x = 15(\frac{800}{5}) = 2400$$

emilyngiron · Answer

okay that was simple. it was different tan the example on the page