Concept:Students pass if their marks are at or above the pass mark of 50%.Explanation:From the bar chart, the number of students who scored 50 marks is 45.The number of students who scored 65 marks is 25.The number of students who scored 80 marks is 15.Students who scored the pass mark or higher are those with marks 50, 65, and 80.So, total passed =45+25+15=85 students.Answer:85 students passed the test.Correct option: B. 85
