Answer: his score on the last one is 45.
Step-by-step explanation:
Let h represent the his score on the last inning.
Average number of runs = sum of runs/total number of innings played.
From the information given,
Average number of runs = 46
total number of innings played = 5
Sum of runs= 46 + 45 + 39 + 55 + h = 185 + h
Therefore,
46 = (185 + h)/5
Cross multiplying by 5, it becomes
46 × 5 = 185 + h
230 = 185 + h
h = 230 - 185
h = 45