An Unprepared Student Must Take a 7-Question, Multiple-Choice Test That

question 159

Multiple Choice

An unprepared student must take a 7-question, multiple-choice test that has 5 possible answers per question. If the student can eliminate two of the possible answers on the first five questions, and if she guesses on every question, what is the probability that she will answer at least one question correctly? ​

• A)Pr(at least 1 correct) =
• B)Pr(at least 1 correct) =
• C)Pr(at least 1 correct) =
• D)Pr(at least 1 correct) =
• E)Pr(at least 1 correct) =

---

Definitions:

Ratio

A quantitative relationship between two numbers, showing how many times the first number contains the second or is contained within it.

Earnings Per Share

Earnings per share (EPS) is a financial ratio that divides the net earnings available to common shareholders by the average outstanding shares, indicating how much money shareholders would receive for every share owned.

Income Before Interest

Profits calculated after all expenses except interest expenses have been deducted from revenues.

Income Taxes

Income taxes are government levies imposed on individuals and entities' income, varying based on the taxable income amount.