Maternal Mortality Ratio (MMR) is conventionally expressed per: MCQ with Answer and Explanation

Explanation:
For an even number of ordered observations, the median is the arithmetic mean of the two central values, ensuring it represents the center of the distribution.

Explanation:
a + b = 20 and ab = 36. Solving gives 2 and 18 (2 + 18 = 20, 2 × 18 = 36).

Explanation:
CPI weights items according to their share in average household consumption expenditure, derived from consumer expenditure surveys, to reflect the cost of living for typical families.