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Mathematics

The mean of 12, 22, 33 and 44 is:

  1. 24

  2. 72

  3. 144

  4. 264

Measures of Central Tendency

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Answer

Given,

Number of observations = 4

By formula,

Mean = Sum of all observationsTotal number of observations\dfrac{\text{Sum of all observations}}{\text{Total number of observations}}

Substituting values we get :

Mean =12+22+33+444=1+4+27+2564=2884=72.\text{Mean }= \dfrac{1^2 + 2^2 + 3^3 + 4^4}{4} \\[1em] = \dfrac{1 + 4 + 27 + 256}{4} \\[1em] = \dfrac{288}{4} \\[1em] = 72.

Hence, option 2 is the correct option.

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