Directions: Study the given bar graph and answer the following question.
How many students obtained less than the average marks of the class?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 14.
Average = Sum of observations/Number of observations
Average marks of the students = {(125 × 1) + (130 × 3) + (135 × 2) + (140 × 8) + (145 × 5) + (150 × 4) + (160 × 1)} / 24
= (125 + 390 + 270 + 1120 + 725 + 600 + 160) / 24 = 141.25
Number of students who scored below the average marks = 1 + 3 + 2 + 8 = 14