A Multiple Choice Test Has 7 Questions Each of Which

question 132

Multiple Choice

A multiple choice test has 7 questions each of which has 5 possible answers, only one of which is correct. If Judy, who forgot to study for the test, guesses on all questions, what is the probability That she will answer exactly 3 questions correctly?

• A) 0.115
• B) 0.885
• C) 0.275
• D) 0.00800

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Definitions:

Characteristics

distinguishing traits, qualities, or properties of an object, person, or thing.

Statocysts

Sensory organs found in invertebrates that help in detecting gravity and spatial orientation.

Crustaceans

A diverse group of aquatic animals within the arthropod phylum including crabs, lobsters, crayfish, shrimp, and barnacles, characterized by a hard exoskeleton and jointed limbs.

Gravity

The natural force of attraction exerted by a celestial body (such as Earth) on objects that are on or near its surface, drawing them toward the center of the body.