Q.3 (3) Distinguish between Crude birth rate and Crude death rate.
Best answer
Answer: Crude birth rate measures the number of live births, while crude death rate measures the number of deaths, per 1000 population in a year.
| Point | Crude birth rate (CBR) | Crude death rate (CDR) |
|---|---|---|
| Meaning | Number of live births per 1000 people in a year. | Number of deaths per 1000 people in a year. |
| Formula | \( \text{CBR} = \dfrac{\text{Live births in a year}}{\text{Mid-year population}} \times 1000 \) | \( \text{CDR} = \dfrac{\text{Deaths in a year}}{\text{Mid-year population}} \times 1000 \) |
| Effect on population | Adds to the population. | Reduces the population. |
| Factors | Age at marriage, religion, customs, literacy, family planning. | Health care, nutrition, sanitation, epidemics, wars, disasters. |
| Trend | High in developing countries, low in developed countries. | Has fallen almost everywhere due to medical progress; slightly higher in countries with many elderly. |
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