RRB Group D 8-Dec-2013 Shift 1 Solved Paper

Sum of 15 numbers = 15 × 7 =105
Sum of the first eight numbers = 8
× 6.5 = 52 Sum of the last eight numbers = 8
× 9.5 = 76 Middle number = Sum of the first eight numbers + Sum of the last eight numbers – Sum of the total numbers
= 76 + 52 – 105 = 23