A survey for a certain year found that 90% of pregnant women received medical care at least once before giving birth. Of these women, 80% received medical care from doctors, while 40% received medical care from other healthcare providers. Given this information, which one of the following statements can be inferred with certainty? A. More than half of the pregnant women received medical care at least once from a doctor. B. Less than half of the pregnant women received medical care at least once from a doctor. C. More than half of the pregnant women received medical care at least once from a doctor. D. Less than half of the pregnant women received medical care at least once from a doctor.

GATE 2023 · General Aptitude · Logical Reasoning · medium

Answer: 72% of all pregnant women received care from a doctor, confirming that more than half did. Answer: A.

1. Find percentage of ALL women who saw a doctor: 0.90 x 0.80 = 0.72, so 72% of all pregnant women received care from a doctor.
2. Compare with 50% and identify the certain statement: Since 72% > 50%, more than half of all pregnant women received medical care from a doctor. Statement A is certainly true.