List X and list Y each contain 60

List X and list Y each contain 60 numbers. Frequency distributions for each list are given above. The average (arithmetic mean) of the numbers in list X is 2.7, and the average of the numbers in list Y is 7.1. List Z contains 120 numbers: the 60 numbers in list X and the 60 numbers in list Y. Quantity A : The average of the 120 numbers in list Z Quantity B : The median of the 120 numbers in list Z Quantity A is greater., Quantity B is greater., The two quantities are equal., The relationship cannot be determined from the information given.