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There are four grades in a school. The average marks obtained in Grade 9, Grade 10, Grade 11 and Grade 12 are 65, 70, 70 and 74 respectively. The number of students in each corresponding grade is 40, 45, 35 and 50 respectively. What is the weighted arithmetic mean score for all students of all grades?
69
70
73
68
70
Practice and solve "There are four grades in a school. The average marks obtained in Grade 9, Grade 10, Grade 11 and Gra..." for Mathematics - Previous Year Paper 2026. The correct answer is Option B: 70. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Practice and solve "There are four grades in a school. The average marks obtained in Grade 9, Grade 10, Grade 11 and Gra..." for Mathematics - Previous Year Paper 2026. The correct answer is Option B: 70. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.