Communication Systems - Engineering

Q1:

An image uses 512 x 512 picture elements. Each element can take any of eight distinguishable levels. The maximum entropy in the above image will be

A 2097152 bits

B 786432 bits

C 648 bits

D 144 bits

ANS:B - 786432 bits

The Formula might be 3 * (512*512).
As n=3 from 2^3=8.
You'll get 786432.