Study the given bar graph and calculate the average number of girls studying in the 5th, 6th and 8th grades.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 30.
Number of girls in 5th class = 30
Number of girls in 6th class = 35
Number of girls in 8th class = 25
Average = Sum of all numbers/Total numbers
The average number of girls studying in the 5th, 6th, and 8th grades = (30 + 35 +25)/3 = 90/3 = 30