Hello, Koustubh!

Without numbers, the problem is virtually impossible.

Evennumbers, the solution would fill volumes.with

I have a 2D markov chain with 4 states.

I need to calculate the mean time to reach the state '11' from state '00'.

Could please someone help me with this?

According to your diagram, we seem to have this transition chart.

. .

Let

We want the probability of going from to in steps.

Do you see the difficulty?