Question

В красную книгу по ско занесено 12 видов грызунов.число видов парнокопытных составило 1/3 от числа видов грызунов и в 2 раза больше , чем зайцеобразных, а число видов рукокрылых составило 50% от числа видов зайцеобразных. сколько видов парнокопытных зайцеобразных и рукокрылых занесино в красную книгу по с к о???

Answer 1

1) 12:3*1=4(вид.) парнокопытные
2) 4:2=2(вид.) зайцеобразные
3)2:100*50=1(вид.) рукокрылые
Ответ: 4 вида парнокопытных, 2 вида зайцеобразных, 1 вид рукокрылых.

Answer 2

12:3=4 вида парнокопытных
4:2=2 вида зайцеобразных
2:2=1 вид рукокрылых

Answer 3

Red Book Entries for Mammals

In the Red Book, 12 species of rodents are listed. The number of even-toed ungulates constitutes one-third of the number of rodent species and is twice the number of lagomorphs. Additionally, the number of bat species accounts for 50% of the number of lagomorphs. We need to calculate the number of even-toed ungulates, lagomorphs, and bats listed in the Red Book.

Let's calculate the number of even-toed ungulates, lagomorphs, and bats based on the given information.

Calculation

Given: - Number of rodent species = 12 - Number of even-toed ungulates = 1/3 * Number of rodent species - Number of even-toed ungulates = 2 * Number of lagomorphs - Number of bat species = 50% of Number of lagomorphs

Let's denote: - Number of rodent species as R - Number of even-toed ungulates as E - Number of lagomorphs as L - Number of bat species as B

We can express the relationships as: 1. E = (1/3) * R 2. E = 2 * L 3. B = 0.5 * L

We also know that: - R = 12 (given)

Using the above relationships, we can calculate the values of E, L, and B.

Calculation Steps

1. Calculate the number of even-toed ungulates (E): - E = (1/3) * 12 - E = 4

2. Calculate the number of lagomorphs (L): - E = 2 * L - 4 = 2 * L - L = 2

3. Calculate the number of bat species (B): - B = 0.5 * 2 - B = 1

Results

Based on the given information, the number of species listed in the Red Book for each category is as follows: - Even-toed ungulates: 4 species - Lagomorphs: 2 species - Bats: 1 species