Question

A person moving through a tuberculosis prone zone has a 50% probability of becoming infected. However, only 30% of infected people develop the disease. What percentage of people moving through a tuberculosis prone zone remains infected but does not show symptoms of disease?

• A.
  15
• B.
  33
• C.
  35
• D.
  37

Answer 1

The correct option is C

35
$Therequiredprobability$

$0.5\times 0.7=0.35\approx \frac{35}{100}=35\%$