Question

in a pond there were 400 frogs last year and through reproduction 200 frogs were added taking current population to 600. the birth rate is
a) 0.4
b) 0.5
c) 0.6
d) 0.7

Answer 1

Correct option is (b) 0.5

Birth rate = 0.5 offspring per frog per year.

Explanation:

Birth rate = A number of frogs added to the population in A given time/ total number of frogs initially present in the pond.

Birth rate = $\frac{200}{400}$

Birth rate = 0.5 offspring per frog per year.

Answer 2

The birth rate of the frog in the bond is 0.5 per year.

Option - B

Explanation:

From the question, we can understand that,

• In last year there are 400 frogs and in the next year 200 frogs were added through reproduction.
• And the total frogs in the pond is 600 frogs.

We need to find the birth rate of the frogs.

• Then, the birth rate is defined as per the question, is the ratio of the total no. of frogs added through reproduction in the pond to the total no. of frogs in the pond before reproduction.

Birth rate = The total no. of frogs added through reproduction in the pond / the total no. of frogs in the pond before reproduction.

By the using the above formula,

$= \frac{200}{400}$

= 0.5.

To know more;

In a pond there were 200 frogs. 40 more were born in the year. Calculate the birth rate of the population.

https://brainly.in/question/7330079