An instructor made a frequency table of the scores his students got on a test
$$\begin{array} { c c }
\text { Score } & \text { Frequency } \
30 \text {-under } 40 & 1 \
40 \text {-under } 50 & 4 \
50 \text {-under } 60 & 5 \
60 \text {-under } 70 & 10 \
70 \text {-under } 80 & 20 \
80 \text {-under } 90 & 10 \
90 \text {-under } 100 & 5
\end{array}$$
Approximately what percent of students got more than 70?
A)36
B)20
C)50
D)10
E)64

Question

An instructor made a frequency table of the scores his students got on a test 
$$\begin{array} { c c } 
\text { Score } & \text { Frequency } \
30 \text {-under } 40 & 1 \
40 \text {-under } 50 & 4 \
50 \text {-under } 60 & 5 \
60 \text {-under } 70 & 10 \
70 \text {-under } 80 & 20 \
80 \text {-under } 90 & 10 \
90 \text {-under } 100 & 5
\end{array}$$
Approximately what percent of students got more than 70?
A)36
B)20
C)50
D)10
E)64

Quizplus · Accepted Answer

To find the percentage of students who scored more than 70, add the frequencies of scores from the ranges 70-under 80, 80-under 90, and 90-under 100: 20 + 10 + 5 = 35. The total number of students is the sum of all frequencies: 1 + 4 + 5 + 10 + 20 + 10 + 5 = 55. The percentage is (35/55) * 100 ≈ 63.64%, which rounds to approximately 64%.

An Instructor Made a Frequency Table of the Scores His