professor mean takes a 4 sided die to the grocery store at one end of the chips aisle and travels to the other end. At each different kind of chips, Dr. Mean rolls the die. If it comes up a 4 he purchases the chips for the party. There are 40 different kinds of chips in the aisle. Define random variable x= number of types of chips purchased out of 40. what is the mean of random variable x and the standard deviation. Will get a medal for reply.

Question

professor mean takes a 4 sided die to the grocery store at one end of the chips aisle and travels to the other end. At each different kind of chips, Dr. Mean rolls the die. If it comes up a 4 he purchases the chips for the party. There are 40 different kinds of chips in the aisle. Define random variable x= number of types of chips purchased out of 40. what is the mean of random variable x and the standard deviation.  Will get a medal for reply.