CBR (Crude Birth Rate) is calculated as.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → \( \mathrm{CBR}=\displaystyle\frac{\mathrm{Bi}}{\mathrm{p}}\times 1000 \)
The crude birth rate is the number of live births in a year per thousand of population. So the live births of the year (Bi, also written B) are divided by the mid-year population (P) and multiplied by 1000.
Options (2) and (3) multiply by 10,000 and 1,00,000, and Option (4) turns the fraction upside down.
NCERT (2026-27): “The crude birth rate (CBR) is expressed as number of live births in a year per thousand of population. It is calculated as: \( \mathrm{CBR}=\displaystyle\frac{\mathrm{B}}{\mathrm{P}}\times 1000 \) Here, CBR = Crude Birth Rate; B = live births during the year; P= Estimated mid year population of the area.” |