The geometric mean of two numbers a and b is 6, and their arithmetic mean is 10. The numbers are: MCQ with Answer and Explanation

Explanation:
Sum of 5 numbers = 5 × 20 = 100. Sum of 4 numbers = 4 × 18 = 72. Excluded number = 100 - 72 = 28.

Explanation:
Per WHO definition, perinatal mortality includes late fetal deaths (stillbirths) from 28 completed weeks of gestation and early neonatal deaths (first 7 days), capturing risks around birth.

Explanation:
Births = ASFR × (number of women) / 1000 = 120 × 15000 / 1000 = 1800.