20 children are divided into Two groups A and B of 12 and 8 children respectively. The average marks obtained by the children of group A is 85 and the average marks of all the 20 children is 80. What is the average marks Of children of group B?
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0
Answer:
82 marks is right answer
Answered by
1
Answer:
72.5
Step-by-step explanation:
Total number of children = 20
No. of children in group A = 12
No. of children in group B = 8
Average marks of group A = 85
Average marks of all 20 children = 80
Total marks of children of group A = 85 x 12 = 1,020
Total marks of all 20 children = 80 x 20 = 1,600
Marks of remaining 8 children = 1,600 - 1,020 = 580
Average marks of children of group B = 580/8 = 72.5
Hence, the average marks of children of group B are 72.5.
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