There is a box with 500 resistors, 21 of which are defective. You draw 20 resistors out of the box to build your circuit. Calculate the probability that 3 of these are defective o if you are sampling with replacement 0 if you are sampling without replacement For the previous problem, what is the mean and standard deviation of defective resistors chosen if 0 if you are sampling with replacement 0 if you are sampling without replacement