It seems you've uploaded an image containing a mathematical transformation formula. The content discusses the transformation of marks in terms of mean and variance, where:

• The transformation formula is given as:
  $y = \frac{1}{5}x + 40$ Here, $x$ represents the examination marks before the transformation, and $y$ represents the marks after the transformation.

• Mean After Transformation:
  The mean of the transformed marks $y$ is calculated using the linearity of expectation:
  $\text{Mean}_y = \frac{1}{5} \text{Mean}_x + 40$

• Variance After Transformation:
  The variance of the transformed marks $y$ is affected by the scaling factor, and the transformation of variance is:
  $\text{Variance}_y = \left( \frac{1}{5} \right)^2 \text{Variance}_x$

Do you need help with a specific part of the transformation, or would you like to proceed with an example? Let me know if you need any further clarifications or calculations.