arrow
arrow
arrow
The following dataset represents the number of books read by 25 students in a month: 2 , 4 , 4 , 5 , 5 , 5 , 6 , 7 , 7 , 7 , 7 , 8 , 8 , 9 , 9 , 10
Question

The following dataset represents the number of books read by 25 students in a month:
2 , 4 , 4 , 5 , 5 , 5 , 6 , 7 , 7 , 7 , 7 , 8 , 8 , 9 , 9 , 10 , 10 , 11 , 11 , 12 , 13 , 13 , 13 , 15 , 16.
Calculate the mode of the dataset.

A.

11

B.

13

C.

7

D.

5

Correct option is C

Given
Dataset: 2, 4, 4, 5, 5, 5, 6, 7, 7, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 13, 13, 15, 16
Formula Used
Mode is the value that appears most frequently in a data set.
Solution
Count the frequency of each number:
5 appears 3 times.
7 appears 4 times.
13 appears 3 times.
All other numbers appear less frequently.
Since 7 has the highest frequency (4 times), it is the mode.
Final Answer
So the correct answer is (c)

Free Tests

Free
Must Attempt

RRB NTPC UG Level PYP (Held on 7 Aug 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB Group D Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
test-prime-package

Access ‘RRB NTPC’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
503k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow