In a community of 5000 people crude bih rate is 30/1000. The number of pregnant females is:
**Core Concept**
Crude birth rate (CBR) is a demographic measure that represents the number of live births per 1,000 people in a population per year. It is an indirect measure of fertility and can be used to estimate the number of pregnant females in a population.
**Why the Correct Answer is Right**
To calculate the number of pregnant females, we can use the crude birth rate. The formula for calculating the number of pregnant females is: (Crude birth rate x Total population) / 2. This is because the crude birth rate represents the number of live births per 1,000 people, and we assume that each birth is the result of a pregnancy. Therefore, we divide the total population by 2 to account for the fact that each pregnancy results in one live birth. In this case, the number of pregnant females would be (30/1000 x 5000) / 2.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot evaluate its correctness.
**Option B:** This option is not provided, so we cannot evaluate its correctness.
**Option C:** This option is not provided, so we cannot evaluate its correctness.
**Option D:** This option is not provided, so we cannot evaluate its correctness.
**Clinical Pearl / High-Yield Fact**
When using the crude birth rate to estimate the number of pregnant females, it's essential to remember that this is an indirect measure and may not accurately reflect the actual number of pregnant women, as it doesn't account for stillbirths, miscarriages, or induced abortions.
**Correct Answer:** 750.