问答题What is the average (arithmetic mean) of x and y? (1) The average of x+3 and y+5 is 14. (2) The average of x,y and 16 is 12.
题目
问答题
What is the average (arithmetic mean) of x and y? (1) The average of x+3 and y+5 is 14. (2) The average of x,y and 16 is 12.