Answer:
Minimum = 92 ; maximum =100
Explanation:
Total number of quizzes = 6
Number of completed quizzes = 4
Number of quizzes left = 2
Average score on completed quizzes = 87
Target average = 90
Maximum score for any individual quiz = 100
Current total score on the 4 quizzes to obtain an average of 87:
87 * 4 = 348
To obtain an average of 90:
Total score must in the six quizzes must be :
90 * 6 = 540
Therefore total score needed in the remaining 2 quizzes to attain an average of 90:
540 - 348 = 192
Since the highest attainable score is 100:
Maximum score Ron can attain on one quiz = 100
Minimum he can attain in the other = 192 - 100 92 in other to score an average of 90 in the six quizzes.