In a class the number of boys and girls in the ratio 4:5. If 10 more boy's added in the same class the ratio of number of boys and girls become 6:5. How many girls are there in a class. Explain in step by step procedure. Please urgent. Please help me to solve anyone in detail.
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Step-by-step explanation:
boys =x, x/y=4/5
x+10/y=6/5
5x-4y=0
5x+50-6y=0
-2y+50=0
-2y=-50
y=25,y means girls
5x-4*25=0
x=20