The average of the runs scored by 8 players in an innings is 55. If the runs scored by 7 of these players in that innings are 25, 35, 45, 60, 65, 60 and 80, then how many runs are scored by the 8th player in that innings?

65 80 75 70

70

Total runs scored by 8 players = 8 × 55 = 440 Sum of runs of 7 players = 25 +  35 + 45 + 60 + 65 + 60 + 80 = 370 Runs in 8th innings is = 440 - 370 = 70