i have this math problem that i don't understand...so can u guy help me out....thankss
the question is
Biologist had tagged 500 fish in willow Lake. Later, they found 7 tagged fish in a sample of 700. estimate the number of fish in the lake....
can u guy help me solve it...thanks...i dun get the 7 tagged fish in a sample part...hehe...thanksss
2007-09-04 06:15:11 · 4 answers · asked by . n 1 in Education & Reference ➔ Homework Help
7 out of 700 is 1%. Assuming this sample is illustrative of the fish population you'd expect the 500 tagged fish to make up 1% of total fish population so there'd be 50000 fish in the pond.
2007-09-04 06:21:47 · answer #1 · answered by weasel bat 5 · 0⤊ 0⤋
Okay let us assume no fish died or left the lake. They found 7 tagged fish and know that 500 exist. So they found 7/500 of the total number of fish. The 700 fish samples is thus also 7/500th of the total number of fish. Thus the total number of fish is 500 x 700 / 7 = 50000 fish.
2007-09-04 13:23:35 · answer #2 · answered by CanProf 7 · 0⤊ 0⤋
On the assumption that the number of tagged fish is a representative percentage of those caught then the sample is 1% of the total fish. If 500 are tagged then the total number is 500 x 100/1 = 50000
2007-09-04 13:22:33 · answer #3 · answered by quatt47 7 · 0⤊ 0⤋
7 tagged fish / 700 sample fish = 1% of all fish in the water are tagged. 1% of 50,000 TOTAL FISH IN THE POND gives you the 500 tagged fish to prove it.
2007-09-04 13:21:48 · answer #4 · answered by Anonymous · 0⤊ 0⤋