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The distance of the origin from the centroid of the triangle whose two sides have the equations x – 2y + 1 = 0 and 2x – y – 1 = 0 and whose orthocenter ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ 3 7 , 3 7 is :

1. 2
2. 2
3. 2 2
4. 4

Correct answer: 2 2

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