Price of pen 20 rupees then elasticity of demand 1.6 . Find the MR
The answer is 12.5 .
Marginal Value can be expressed as MR = dTR/dQ ,
dTR with respect to dQ is the first derivative of the total revenue function.
This formula of MR is very useful when the demand function has a known constant price elasticity.
So, here it becomes mr =price/elasticity
=20/1.6 =12.5