How to determine if a graph is symmetrical

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.

How many possible outcomes are there when sharya spins the spinner shown below twice?

There are 36 squares in the model.what is the result of 36 divided by 3