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33. What is the proper way to install a roll of toilet paper: the over” position, in which the portion you grab hangs over t

math   Statistics-And-Probability   
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Answer #1

The correct option is (A) 8/40 [ANSWER]

Explanation:
The required probability is given by:
\begin{align*} \textbf{P(custodian}|\textbf{over)} &= \frac{\text{P(custodian}\cap \text{over)}}{\text{P(over)}} \\ &= \frac{\text{P(custodian and over)}}{\text{P(over)}} \\ &= \frac{\frac{\text{No. of individuals who are custodian and said "over"}}{\text{Total no. of individuals}}}{\frac{\text{No. of individuals who said "over"}}{\text{Total no. of individuals}}} \\ &= \frac{\text{No. of individuals who are custodian and said "over"}}{\text{No. of individuals who said "over"}} \\ &\text{Looking at the values in the table, we get:} \\ &= \frac{8}{8+32} \\ &= \bf \frac{8}{40} \ \ \ \ \ \ \ \ \ \ \ \ \ [ANSWER] \end{align*}

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