Given that john's bowling scores were 120, 144, 143, 111 and 167, find his average score. (the rule for calculating the average of a set of scores is: average score = sum of scores/number of scores.)

Rule for calculating the average of a set of scores is:
Average Score = Sum of Scores/Number of Scores
Sum of scores = 120 + 144 + 143 + 111 + 167 = 685
Number of scores = 5
Average Score = 685/5 = 137
Thus his average score is 137.