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NDA 1 2024 Maths, question 119

Topic: Statistics

Passage · Q119 to Q120

The marks obtained by 1010 students in a Statistics test are 24,47,18,32,19,15,21,35,5024,47,18,32,19,15,21,35,50 and 4141.

Q119

What is the mean deviation of the largest five observations ?

  1. (a) 4.84.8
  2. (b) 5.55.5
  3. (c) 66Correct answer
  4. (d) 7.57.5

Solution.

Answer: (c) 66

  1. The largest five values are 32, 35, 41, 47 and 50.
  2. Their mean is 205/5 = 41.
  3. The absolute deviations are 9, 6, 0, 6 and 9, so their mean deviation is 30/5 = 6.