RRB Group D 20-Sep-2018 Shift 3 Solved Paper

Question : 93 of 100

Marks: +1, -0

Mean of the data 2, x, 7, 3, y, 9, 6 is 6 where x and y are constants. If x is replaced by 3x + 1 and y is replaced by y + 3, then the mean increases by 2. Find the value of x.