The ratio of girls to boys in a class is 3:4. If 3 new girls join and 1boy leaves, what is the new ratio of girls to boys
current:
number of girls -- 3x
number of boys --- 4x
after change:
number of girls -- 3x+3
numbr of boys --- 4x-1
new ratio of girls to boys
= (3x+3) : (4x-1)
more data needed to get numerical answer.
e.g. if we let x = 5
we had 15 girls and 20 boys, notice 15:20 = 3:4
after change:
we had 18 girls and 19 boys, new ratio is 18:19
if we let x = 4
we had 12 girls and 16 boys, notice 12:16 = 3 : 4
after change:
we had 15 girls and 15 boys, new ratio is 1:1
p varies directly as z t=400 find p when t=500
To determine the new ratio of girls to boys in the class, we need to first find the current number of boys and girls in the class.
Let's assume that the initial ratio of girls to boys is 3:4, which means that for every 3 girls, there are 4 boys.
Let's say there are 3x girls and 4x boys initially.
Therefore, the total number of students in the class is 3x + 4x = 7x.
Now, if 3 new girls join, the number of girls becomes 3x + 3, and if 1 boy leaves, the number of boys becomes 4x - 1.
The new ratio of girls to boys can be calculated by dividing the number of girls by the number of boys:
(3x + 3) / (4x - 1)
This is the new ratio of girls to boys in the class after the changes.