420  Average
2

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Class A - 4 students with the score 80%.
Class B - 6 students with the score 50%.
What is the total average score?



Class A - 7 students with the score 60%.
Class B - 3 students with the score 50%.
What is the total average score?



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



Class A - 18 students with the score 50%.
Class B - 2 students with the score 60%.
What is the total average score?



Class A - 3 students with the score 60%.
Class B - 7 students with the score 70%.
What is the total average score?



Class A - 8 students with the score 50%.
Class B - 2 students with the score 70%.
What is the total average score?



Class A - 4 students with the score 60%.
Class B - 6 students with the score 50%.
What is the total average score?



18 ¸íÀÎ ³²Çлý¹ÝÀÇ Æò±ÕÁ¡¼ö´Â 50 Á¡ÀÌ°í,
2 ¸íÀÎ ¿©Çлý¹ÝÀÇ Æò±ÕÁ¡¼ö´Â 80 Á¡À϶§,
µÎ ¹Ý Àüü Æò±Õ Á¡¼ö´Â ¾ó¸¶Àΰ¡?



Class A - 4 students with the score 50%.
Class B - 6 students with the score 90%.
What is the total average score?



Class A - 6 students with the score 40%.
Class B - 4 students with the score 70%.
What is the total average score?



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420    62 57 84 51 67 ( 321 )   54 54 53 74 52 ( 287 )   [[ 608 ]]