Psychology homework help

Use the fact that the mean of a geometric distribution is ? = 1/p and the variance is ?2 = q/p2.A company assumes that 0.5% of the paychecks for a year were calculated incorrectly. The company has 200 employees that examines the payroll records from one month.Find the mean, variance, and standard deviation.How many employees payroll records would you expect to examine before finding one with an error?