If the mean of the data : 7,8,9,7,8,7,

Question:

If the mean of the data : $7,8,9,7,8,7, \lambda, 8$ is 8 , then the variance of this data is :-

  1. 2

  2. $\frac{7}{8}$

  3. $\frac{9}{8}$

  4. 1

Correct Option: , 4

Solution:

Solution not requierd

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