math

To determine the number of trout in a lake, conservationist catches 161 trout, tags them and throuws them back into the lake. Later, 39 trout are caught: 13 of them are tagged. How many trout would the conservationist expect to be in the lake?

  1. 👍
  2. 👎
  3. 👁
  1. from the 13 tagged out of the 39 caught ...
    13/39 = 1/3

    so (1/3)x = 161
    x = 483

    1. 👍
    2. 👎
  2. Two hundred trout were tagged and then released into a pond. Later 60 trout were caught and examined, and 8 of the 60 trout were found to have tags. Estimate the number of trout in the pond.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    oh the 50 fish that Alan cart from the lake 14 were trout .the estimated population of the lake is 7500 fish how many trout would you expect to be in the lake

  2. Stats

    The wildlife department has been feeding a special food to rainbow trout fingerlings in a pond. A sample of the weights of 40 trout revealed that the mean weight is 402.7 grams and the standatd deviation 8alE8 gr. What is the

  3. Science

    14.If a forest ecosystem is removed through clear-cutting, many species of organisms that lived in that ecosystem disappear. Their loss is due to ________________________. 15.When fossil fuels are burned, they produce

  4. math

    ).Find all numbers for which the rational expression is undefined. (4)/(v-2) 2).Find the lcm of (6+7u), (36-49^(u^2)),and(6-7u) ? 3). The speed of train a is 14 mph slower than the speed of train b. Train a travels 190 miles in

  1. Math

    As part of a conservation effort for a lake, 70 fish were caught, tagged, and then released. Later, 80 fish were caught from the lake. Four of these 80 fish were found to have tags. Estimate the number of fish in the lake.

  2. prob. & stat.

    A pond is freshly stocked with 15 brown trout and 9 lake trout. The first fisherman in the area catches and releases a trout. He catches another trout a while later. What is the probability that the fisherman caught brown trout

  3. Math

    This month Carla caught the following fish in Lake George, 24 trout, 41 sunfish, 12 perch and 23 blue gills. If Carla catches another fish this month, what is the probability of her catching a trout? A. about 1/2 B. about 1/4 C.

  4. SCIENCE 1 QUESTION PLS HELP ASAP

    Select three words that belong together. To do this pick one word from each of the three sets below: Set 1: Estuary, Lake, Neritic Zone Set 2: High Salt, Intermediate Salt, No Salt Set 3: Trout, coral, oyster Answer choices: A)

  1. taxation

    On February 12, 2002, Nancy Trout and Delores Lake formed Kingfisher Corporation to sell fishing tackle. Pertinent information regarding Kingfisher is summarized as follows:

  2. calculus

    3000 young trout are introduced into a large fishpond. The number of trout still alive after t years is modeled by the formula N(t) = 3000(.9)^t. What is the rate of population decrease when the number of trout in the pond reaches

  3. Math

    A study found that 27% of the fish in a river are trout, 36% are salmon, and 18% are sturgeon. If a large fish trap is set and it captures 216 fish, how many of those fish are likely to be fish types other than the ones mentioned?

  4. Statistics

    The weights of trout in a certain river follow a normal distribution with mean 3 pounds and standard deviation 0.8 pounds. What proportion of trout weigh between 3.2 pounds and 4.8 pounds? a.) .3891 b.) .9972 c.) .9452 d.) .5865

You can view more similar questions or ask a new question.