Central Tendency & DispersionMTP Dec 22 - Series IQuestion 3255 of 473
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The approximate ratio of SD: MD: QD is

Options

A2:3:4\displaystyle 2:3:4
B3:4:5\displaystyle 3:4:5
C15:12:10\displaystyle 15:12:10
D5:6:7\displaystyle 5:6:7
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Correct Answer

✅ Option c — 15:12:10\displaystyle 15:12:10

All Options:

  • A2:3:4\displaystyle 2:3:4
  • B3:4:5\displaystyle 3:4:5
  • C15:12:10\displaystyle 15:12:10
  • D5:6:7\displaystyle 5:6:7

Detailed Solution & Explanation

For a normal distribution, the relationship between the standard deviation (S.D.), mean deviation (M.D.), and quartile deviation (Q.D.) is given by the ratio: S.D.:M.D.:Q.D.=15:12:10\text{S.D.} : \text{M.D.} : \text{Q.D.} = 15 : 12 : 10 Hence, **Option C** is the correct answer.

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