In a Survey of 22 Instructors, It Was Found That

question 8

Multiple Choice

In a survey of 22 instructors, it was found that 5 liked whiteboards, 15 liked blackboards, and 2 liked both. How many instructors did not like whiteboards?

• A) 13
• B) 4
• C) 19
• D) 17

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Definitions:

Noxious Gases

Refers to harmful or toxic gases, which can be produced by natural processes such as volcanic eruptions or through human activities.

Volcanic Ash

Particles of volcanic tephra that are sand-sized or smaller, and accumulations of such material.

Geologic Hazards

Natural events caused by geological processes, such as earthquakes, landslides, and volcanic eruptions, that can potentially endanger human lives and property.

Volcanic Eruptions

Explosive events where magma, gas, and ash are expelled from a volcano, often with significant force and impact on the surrounding environment.