Richard Has Been Given a 7-Question Multiple-Choice Quiz in His

question 26

Multiple Choice

Richard has been given a 7-question multiple-choice quiz in his history class. Each question has three answers, of which only one is correct. Since Richard has not attended the class recently, he doesn't know any of the answers. Assuming that Richard guesses on all 7 questions, find the probability that he will answer at least 6 questions correctly. Round your answer to the nearest thousandth.

• A)0.006
• B)0.007
• C)0.857
• D)0.286
• E)0.500

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Definitions:

Amorphous

Lacking a definite shape or form; in materials science, referring to a solid that does not possess the long-range order characteristic of crystals.

Isotactic

A polymer configuration where all substituents are on the same side of the polymer chain.

Atactic

A term describing a polymer chain configuration where the substituents on the carbon backbone are randomly oriented, leading to an amorphous material.

Crystallinity

A measure of the degree to which a material has a well-defined crystal structure.