An Exam Consists of Ten True-Or-False Questions

question 171

Multiple Choice

An exam consists of ten true-or-false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly seven questions correctly?

• A) 0.105
• B) 0.775
• C) 0.805
• D) 0.669
• E) 0.117
• F) 0.539

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Definitions:

Baking Soda

Sodium bicarbonate, a compound with formula NaHCO3, commonly used in baking as a leavening agent.

Muffins

Small, single-serving quick breads baked in portions appropriate for one person, often sweetened and flavored with various ingredients.

Brownies

A square or rectangular chocolate baked treat that's dense and can be either fudgy or cakey in texture.

Sodium Bicarbonate

A chemical compound with the formula NaHCO3, commonly known as baking soda, used in baking, cleaning, and antacid preparations.