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NDA 2019
Exam
NDA
Year
2019
Subject
Mathematics
Chapter
Statistics

NDA 2019 · Mathematics · Statistics

The class marks in a frequency table are given to be 5,10 ,...

The class marks in a frequency table are given to be 5,10 , 15,20,25,30,35,40,45,5015,20,25,30,35,40,45,50. The class limits of the first five classes are

Options

  1. A3−7,7−13,13−17,17−23,23−273-7,7-13, 13-17, 17-23, 23-27
  2. B2.5−7.5,7.5−12.5,12.5−17.5,17.5−22.5,22.5−27.52.5-7.5,7.5-12.5,12.5-17.5, 17.5-22.5, 22.5-27.5
  3. C1.5−8.5,8.5−11.5,11.5−18.5,18.5−21.5,21.5−28.51.5-8.5,8.5-11.5,11.5-18.5,18.5-21.5,21.5-28.5
  4. D2−8,8−12,12−18,18−22,22−282-8,8-12,12-18,18-22,22-28

Correct answer

B. 2.5−7.5,7.5−12.5,12.5−17.5,17.5−22.5,22.5−27.52.5-7.5,7.5-12.5,12.5-17.5, 17.5-22.5, 22.5-27.5

Step-by-step solution

It can be clearly seen from options that class limits are 2.5−7.5,7.5−12.5,…2.5-7.5,7.5-12.5, \ldots.
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