Class A has 10 students with an average score of 70 marks. Class B has 15 students with an average score of 80 marks. What is the combined average score of all the students in both classes?
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Worked Solution
Step 1: Find the total score of Class A.
10 x 70 = 700 marks
Step 2: Find the total score of Class B.
15 x 80 = 1200 marks
Step 3: Find the combined total score.
700 + 1200 = 1900 marks
Step 4: Find the combined number of students.
10 + 15 = 25 students
Step 5: Find the combined average.
1900 divided by 25 = 76 marks
The combined average score is 76 marks.
Answer: 76
Correct answer: 76
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