When Do Creative People Get Their Good Ideas? Assume That

Multiple Choice

When do creative people get their good ideas? Assume that the survey of 965 inventors gives the following information: Assuming that the time interval includes the left limit and all the times up to but not including the right limit, estimate the probability that an inventor has a good idea during the time interval from 6 P.M. to midnight. Write your answer as a fraction in simplest form.
$$\begin{array}{l}\text { Time of Day When Good Ideas Occur }\\\begin{array} { l c } { \text { Time } } & \begin{array} { c } \text { Number of } \\\text { Inventors }\end{array} \\6 \text { A.M. } - 12 \text { noon } & 284 \\12 \text { noon } - 6 \text { P.M. } & 133 \\6 \text { P.M. } - 12 \text { midnight } & 325 \\12 \text { midnight } - 6 \text { A.M. } & 223\end{array}\end{array}$$

A) $\frac { 1 } { 2 }$
B) $\frac { 1 } { 4 }$
C) $\frac { 65 } { 193 }$
D) $\frac { 65 } { 128 }$
E) none of these choices