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07 Nov 2018, 02:09
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
58% (01:15) correct
42%
(01:17)
wrong
based on 94
sessions
History
Date
Time
Result
Not Attempted Yet
In the XY-plane, does the point (m, n) lie below the line y = x?
(1) m = 4
(2) n = m + 4
(1) m = 4
(2) n = m + 4
Stat 1) no info about n so insuff
stat 2) n= m+ 4, trying diff values we can get (m,n) as (6,10) which is above line y=x and (-6,-2) which is above the line y=x; so suff
correct a mistake
stat 2) n= m+ 4, trying diff values we can get (m,n) as (6,10) which is above line y=x and (-6,-2) which is above the line y=x; so suff
correct a mistake
07 Nov 2018, 05:01
Kudos
Bookmarks
Bunuel
1) No information about n. ----------In Suff
2) some of the points on line y = x..... are (4,4),(0,0),(-1,-1) ,(-5,-5) etc
Now when the x-axis value of (m,n) i.e., m is considered , if n = m + 4, then the corresponding points are (4,8),(0,4),(-1,3) ,(-5,-1)
So these points are never lie below y=x , according to the given condition. ----------Suff
Or Alternatively , if we consider n = m + 4 in the eqn form of line B :\(y = x + 4\) , then line B is ll to line A :\(y=x\)
and the y axis distance from B to A is -4 and A to B is +4 ( as x intercept of line A is 0 and x intercept of line B is 4)
So these points are never lie below y=x , according to the given condition. ----------Suff
Thus Ans B
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