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Question

The following table shows data during a 1hr exam for a student. 

        Time during exam(mins)                Total number of questions solved in the exam        010210205203010304015405017506025

The number of questions completed by the student in the last 10 minutes of the examination is ?



Correct Answer
A

Your Answer
B

Your Answer
C

Your Answer
D


Solution

The correct option is C


The table contains the time wise number of questions solved by a student in 1hr .The total number of questions solved as given in the table is the cumulative frequencyof the number of questions and not the frequency which can be understood from the data points. In 0-10 mins of the exam , a student solved 2 questions.

In 10-20 mins of the exam he/she solved 5 questions which implies that he/she solved 3 questions in next 10 mins of the exam. 

Total number of questions solved within 60 minutes = 25

Total number of questions solved within 50 minutes = 17

Total number of questions solved in the last 10 minutes = 25 - 17 = 8

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