Maths questions easy?
2016-08-08 8:32 am
In a school, there're 400 boys and 600 girls are in the ratio of 2 : 3. After teh exam, some boys and girls graduate and the ratio fo boys and girls will become 15 : 23. If the numbers of boys and girls who will graduate are the same, find the total number of student who will graduate. Thx.
回答 (1)
2016-08-08 10:14 am
(400-X)/(600-X)=15/23
9200-23X=9000-15X
8X=200
X=25
Graduating boys = Graduating girls = 25
Total Graduating = 50
9200-23X=9000-15X
8X=200
X=25
Graduating boys = Graduating girls = 25
Total Graduating = 50
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