A Hypothetical Vaccine Has a 2% "Failure Rate

question 43

Multiple Choice

A hypothetical vaccine has a 2% "failure rate".It has been administered to all but 12 children in a school with 1000 students.The disease the vaccine is designed to prevent is introduced by a new student and spreads rapidly via the respiratory route.How many children do you predict will fall ill by catching the diease from the sick child?

• A)12
• B)10
• C)20
• D)32
• E)120

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Definitions:

Radiometric Dating

A technique used to date materials such as rocks or carbon, by measuring the decay rate of radioactive isotopes contained within those materials.

K-Pg Boundary

A geological signature marking the transition between the Cretaceous (K) and Paleogene (Pg) periods, approximately 66 million years ago, associated with the mass extinction event that included the demise of the dinosaurs.

Cretaceous Period

A geological period from about 145 to 66 million years ago, known for being the last portion of the age of dinosaurs.

Tectonic Plates

Massive, irregularly shaped slabs of solid rock composing the Earth's lithosphere, whose movements cause earthquakes, volcanic eruptions, and the formation of mountains.