Question

An instructor made a frequency table of the scores his students got on a test score frequency 30-under 40 1 40-under 50 4 50-under 60 5 60-under 70 10 70-under 80 20 80-under 90 10 90-under 100 5 approximately what percent of students got more than 70

Answer 1

First, you add up the total number of students because we would base our percentage one this.

Total number of students = 1+4+5+10+20+10+5
Total number of students = 55

Now, let's count how many of them got a score of more than 70. For this, you would only count the students belonging to 70-under 80, 80-under 90 and 90-under 100.

Students who got more than 70 = 20+ 10 + 5 = 35

Therefore the percentage is equal to:
Percentage = 35/55 * 100 = 63.64%