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If the points (k ,\ 2k),\ (3k ,\ 3k) ...

If the points `(k ,\ 2k),\ (3k ,\ 3k)` and `(3,\ 1)` are collinear, then `k` `1/3` (b) `-1/3` (c) `2/3` (d) `-2/3`

A

`-1/2`

B

`1/2`

C

`(-1) /7`

D

`1/7`

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The correct Answer is:
B
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