Over the course of a year, the probability that a house in an urban area will be burglarized is 5%. a) If 20 houses are randomly selected, what is the mean and standard deviation of the number of houses burglarized? b) Use part (a) to help determine the number of houses out of 20 that we would usual (2 standard deviations) to be burglarized.

can you answer this and show what formula you use?