Extending this model is randomized number to generate node in the value range [0, 1] is coming out by chance that the randomized distribution that are coming out, there will be one of the values in the range will have the same value.
Therefore, in order to bring random numbers to apply to various two parameters of structure WSNs are total number of node and hop distance (h) must convert the number to a random number in the range of WSNs.