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Question

The ratio in which the line segment joining (3,4) and (2,1) is divided by the y-axis is

A
1:2
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B
1:3
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C
3:2
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D
None of these
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Solution

The correct option is C 3:2
Let A(3,4) and B(2,1) be the two points
Taking the ratio as k:1 in which the point P divides, we have the co-ordinates to be [kx2+x1k+1,ky2+y1k+1]
According to coordinates , point A is 3 units from the y-axis in the positive direction .Similarly point B is 2 units from the y-axis in the negative direction.
[k(2)+3k+1,k(1)+(4)k+1] = (0,y)
On solving we get k=32
y-axis divides the line AB in the ratio 3:2
Ratio =3:2

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