Total Fertility Rate (TFR) is obtained by summing ASFRs for all age groups and multiplying by 5 if 5-year age groups are used. This is because: MCQ with Answer and Explanation

Explanation:
Total ways C(12,2)=66. Favorable: C(5,2)+C(4,2)+C(3,2) = 10+6+3=19. Probability=19/66.

Explanation:
Life expectancy is derived from age-specific mortality rates and reflects overall mortality conditions.

Explanation:
P(both red) = (3/5) × (2/4) = 6/20 = 3/10. Without replacement, the probability changes after the first draw, requiring multiplication of conditional probabilities.