Using the most recent itemized phone bills. Assume that incoming and out going calls are equal in the population. This means assume p=0.

Using the most recent itemized phone bills. Assume that incoming and out going calls are equal in the population. This means assume p=0.5. For the number of calls made last month, what would be the mean number of outgoing calsl in a random selection of calls? Also, compute the standard deviation. In a selection of 12 calls, what is the probability that less than 3 were outgoing?