Question

A pond contains 1000 fish, 100 of which have been tagged. You catch 10 fish. How many of the fish would you expect to be tagged? A. 0 B. 1 C. 5 D. 10

Answer 1

Answer: 1

Explanation:

The total number of fishes are 1000. Out of those 1000 fishes only 100 are tagged.

This states that 1/10th of the fishes are tagged out of the total number. If 10 fishes are taken out then there is a chance that out of those 10 at least 1 fish would be tagged.

This is because 1000/100* 10= 1

Hence, the correct answer is option B, that one fish will be tagged out of the 100 fish that is taken out.

Answer 2

Answer: B) 1

Explanation:

Total fish = 1000, tagged fish = 100. Thus the ratio of tagged fish to total fish is 100:1000 i.e. 10

Now if out of 1000 fish, 100 are tagged

Out of 10, no of fish that will be tagged is
`=(100)/(1000)* {10}=1`

Thus 1 fish will be tagged out of 100.