ds ques pls help

Ans IMO is B

We need to find
is 2r+3s = 6 ??


A
you are not sure whether 2r+3s will be 6 or not

B
you can easily find that 2r+3s is not zero



Image pasting:
copy paste the image in work doc and upload the doc
or
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can u bit elaborate .........i didnt get at all the soultion ...

2r+3s is not there in A its 3r+2s..and OA is not B.=

vivek.kapoor83 wrote:can u bit elaborate .........i didnt get at all the soultion ...

I am confused why are writing region?
the equation corresponds to a line

I am assuming that you want me to find whether a point is on the line or not.......
(r,s) will be on line with equn 2x+3y=6 if and only if 2r+3s=6

so we need to find 2x+3y=6 or not


A
3r+2s=6
we can not find 2r+3s=6 or not
so insufficient

B:
r=3, s=2
so here
2r+3s = 2*3 + 3*2 = 12
as 12 != 6
so the point is not on the line
but this equn is sufficient to answer

so ans is B


if the A is
2x+3y=6
thn answer would become D

vivek.kapoor83 wrote:2r+3s is not there in A its 3r+2s..and OA is not B.=

whats the OA?

OA is E.

is thr any image also with the question?

Nope no image...it is as it is

I would wait for others to comment on.
May be the question is asking for points enclosed inside this line and x, yaxis

stop@800 wrote:

vivek.kapoor83 wrote:can u bit elaborate .........i didnt get at all the soultion ...

I am confused why are writing region?
the equation corresponds to a line

I am assuming that you want me to find whether a point is on the line or not.......
(r,s) will be on line with equn 2x+3y=6 if and only if 2r+3s=6

so we need to find 2x+3y=6 or not


A
3r+2s=6
we can not find 2r+3s=6 or not
so insufficient

B:
r=3, s=2
so here
2r+3s = 2*3 + 3*2 = 12
as 12 != 6
so the point is not on the line
but this equn is sufficient to answer

so ans is B


if the A is
2x+3y=6
thn answer would become D

I've got the same answer with same logic

the st line cuts x and y axis @ (3,0) and (0,2)

so r = 3 and s=2 will fall outside straight line.

hence answer is B.
how the oa is E?