A poll was taken of 13,863 working adults aged 40-70 to determine their level of educatic The participants were classified by sex and by level of education. The results were as folls
$\begin{array}{cccc}
\hline \text { Education Level } & \text { Male } & \text { Female } & \text { Total } \
\hline \text { High School or Less } & 3043 & 2133 & 5176 \
\text { Bachelor's Degree } & 3428 & 4150 & 7578 \
\text { Master's Degree } & 554 & 423 & 977 \
\text { Ph.D. } & 72 & 60 & 132 \
\hline \text { Total } & 7097 & 6766 & 13,863
\end{array}$
A person is selected at random. Compute the probability that the person is male or has a P .D.
A) 0.516
B) 0.512
C) 0.521
D) 0.010

Question

Quizplus · Accepted Answer

The probability that the person is male or has a Ph.D. is calculated by adding the probability of being male to the probability of having a Ph.D., and then subtracting the probability of being both male and having a Ph.D. (to correct for double counting). The number of males is 7097, the total number of participants is 13863, and the total number of people with a Ph.D. is 132, with 72 being male. So, the calculation is $(7097 + 132 - 72) / 13863 = 7157 / 13863 \approx 0.516$.

A Poll Was Taken of 13,863 Working Adults Aged 40-70