A's salary is 20% less than B's salary. If C's salary is Rs. 10000 and it is 25% more than B's salary, then what is A's salary?

Rs. 6400

Let B's salary be $x$.

Since C's salary is 25% more than B's salary:

$1.25x = 10000$

$x = \frac{10000}{1.25} = 8000$

So, B's salary = ₹8000.

Now, A's salary is 20% less than B's salary:

$A = 8000 \times \frac{80}{100} = 6400$