Originally Posted by

**fatalaccidents** Hey guys,

I need help on this problem. I feel like I'm misunderstanding the question entirely.

Consider a set of n items, and let fi, i = 0, ..., n-1 denote the probability of encountering item i (for instance, if the items represent words of the English language, fi is the frequency at which the i-th word appears in text). Let us assume that the probabilities follow a Geometric distribution, i.e.

fi = c x 2^(-i-1)

a) determine the value of the constant c.

* I think that the sum of all geometric sums is equal to 1, but I can't figure out how this helps me find the constant.