251  Average
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Class A - 7 students with the score 60%.
Class B - 3 students with the score 60%.
What is the total average score?



Class A - 13 students with the score 90%.
Class B - 7 students with the score 60%.
What is the total average score?



Class A - 6 students with the score 40%.
Class B - 4 students with the score 60%.
What is the total average score?



Class A - 3 students with the score 90%.
Class B - 7 students with the score 70%.
What is the total average score?



Class A - 15 students with the score 40%.
Class B - 5 students with the score 70%.
What is the total average score?



Class A - 4 students with the score 80%.
Class B - 6 students with the score 90%.
What is the total average score?



Class A - 7 students with the score 40%.
Class B - 3 students with the score 60%.
What is the total average score?



Class A - 14 students with the score 90%.
Class B - 6 students with the score 90%.
What is the total average score?



Class A - 6 students with the score 90%.
Class B - 4 students with the score 40%.
What is the total average score?



Class A - 18 students with the score 70%.
Class B - 2 students with the score 80%.
What is the total average score?



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251    60 79.5 48 76 47.5 ( 311 )   86 46 90 70 71 ( 363 )   [[ 674 ]]