Question : 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?
Option 1: 1 : 5
Option 2: 3 : 5
Option 3: 2 : 3
Option 4: 2 : 5
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Correct Answer: 1 : 5
Solution :
The number of students who got marks between 30 - 40 was 20.
Total student = 12 + 16 + 20 + 28 + 8 + 12 + 4 = 100
⇒ The required ratio = $\frac{20}{100}$ = $\frac{1}{5}$
Hence, the correct answer is 1 : 5
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