Study the following histogram and answer the given question.
What is the ratio of the number of students who scored 30 or more marks, but below 40 marks to the total number of students in the entrance examination?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 1 : 5
The ratio of the number of students who scored 30 or more marks but below 40 marks = 20
Total number of students = 12 + 16 + 20 + 28 + 8 + 12 + 4 = 100
Required ratio = 20 : 100 = 1 : 5.