(5x600) + (5x400)
3000 + 2000
5000
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.4706 or 47.06%
you would add the boys and the girls and then divide divide the boys by the total student in the bag
Answer: x is 20
Step-by-step explanation:
This is ratio
a : c = b : x and d : unknown
a : c = 9 : 12 = 3 : 4 which is 9/12
b : x = 15 : x which is 15 / x
So the proportion will be :
3/4 = 15/x
So Cross multiplying
3x = 90
Divide both side by 3
x = 90/3
x = 20