Batting average of a cricket player for 30 innings is 40 runs.Total number of runs = 30 × 40 = 1,200 runs.Average of the remaining 28 innings is 38 runs.Total number of runs = 28 × 38 = 1,064Score of two innings which are not included =1,200−1,064=136 runs.Let the lowest score be =xHigh score =100+xSum of scores of the two innings = 136 x+100+x=1362x=36The lowest score = x = 18 runs.