The pie chart illustrates the proportion of students who studied in five amounts of time for an exam and the bar chart shows the average marks of students based on hours spent.
Overall, the percentage of students who spent slightly more hours studying than the average time of studying, got the highest scores in the exam. So on, the ones that spent less time for preparation, got less marks. However, those insignificant percentage of students who spent the longest hours, got approximately the same result as students that spent an average time studying.
The 30% of students who studied between 76 and 100 hours obtained approximately 90 marks, that’s being the highest one. So on, the significant 38% of students who spent 51-75 hours studying got 75 marks.
Meanwhile, these 9% of students who spent the greatest time (101-125 hours) studying for exam, obtained only 80 marks, it’s less for 10 marks than “51-75 hours” students did.