Don't copy and use bot I will report to your answer if copy or bot use then downvote for sure. I need typed answer.

Suppose that a candy company packages a bag of jelly beans whose mass is supposed to be 30 grams, but in fact, the mass varies from bag to bag according to a normal distribution with mean = 30 grams and standard deviation = 3 grams. If the bags of jelly beans are sold in packs of 4 bags, what is the probability that the average mass of a bag in a random pack (of 4 bags) is