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Question

XOZ plane divides the join of (2,3,1) and (6,7,1) in the ratio

A
3:7
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B
2:7
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C
3:7
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D
2:7
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Solution

The correct option is D 3:7
Let the plane divide the line in the ratio p:1.
A point that divides the line joining these 2 points in the ratio p:1 is given by, (6p+2p+1,7p+3p+1,p+1p+1)
Since, this point has to lie on the zx plane, so
7p+3=0
p1= 37

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