​A Study of the Effectiveness of a Flu Vaccine Was

question 28

Multiple Choice

​A study of the effectiveness of a flu vaccine was conducted with a sample of 464 people.Some participants in the study were given no vaccine,some were given one injection,and some were given two injections.The results of the study are listed in the table. ​
$$\begin{array} { | l | l | l | l | l | } \hline & \begin{array} { l } \text { No } \\\text { vaccine }\end{array} & \begin{array} { l } \text { One } \\\text { injection }\end{array} & \begin{array} { l } \text { Two } \\\text { njections }\end{array} & \text { Total } \\\hline \text { Flu } & 8 & 5 & 12 & 25 \\\hline \text { No flu } & 135 & 41 & 263 & 439 \\\hline \text { Total } & 143 & 46 & 275 & 464 \\\hline\end{array}$$
A person is selected at random from the sample.Find the probability that the person had two injections.Round your anser to one decimal place.

• A)​275.0%
• B)​63.3%
• C)​71.3%
• D)​67.3%
• E)​59.3%

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Definitions:

Capital Structure

The composition of a firm's financing through a mix of debt, equity, and other financial instruments, affecting its risk and valuation.

Dividend Payout Ratios

The fraction of earnings paid to shareholders in dividends, usually expressed as a percentage.

Pretax Cost of Debt

The rate of interest a company pays on its borrowings before tax adjustments, often used in calculating the cost of capital for a company.

Retained Earnings

Profits that a company has kept or retained rather than paid out as dividends.