The reflection of the point `(2,-1,3) ` in the plane `3x-2y-z=9` is (A) `(28/7,15/7,17/7)` (B) `(26/7,-15/7,17/7)` (C) `(15/7,26/,-17/7)` (D) `(26/7,17/7,-15/70)`

The position vector of the point, which divides the line segment joining the points (1,3,-9) and (6,-2,-4) in the ratio 2:3 is A) (3,-1,-7) B) (-3, 1, -7) C) (3, 1, -7) D) (-3,-1,7)

The directionratios of the line which is perpendicular to the lines (x-7)/2=(y+17)/(-3)=z-6 and x+5=(y+3)/2=(z-4)/(-2) are (A) (4,5,7) (B) (4,-5,7) (C) (4,-5,-7) (D) (-4,5,7)

If 8tan x=15, then sin x-cos x is equal to (8)/(17)( b) (17)/(7)( c) (1)/(17) (d) (7)/(17)

The inverse of the matrix [(2,3),(-4,7)] is (A) [(-2,-3),(4,-7)] (B) 1/26 [(7,-3),(4,2)] (C) [(7,4),(-3,2)] (D) [(7,-3),(4,2)]

(5)/(7) of a number is (2)/(3) . What is the number ? A) (15)/(14) B) (15)/(7) C) (7)/(15) D) (14)/(15)

The mean deviation about the median of the numbers 2, 3, 5, 20, 17, 15, 11, 9, 7 is

The distance between the parallel lnes y=2x+4 and 6x-3y-5 is (A) 1 (B) 17/sqrt(3) (C) 7sqrt(5)/15 (D) 3sqrt(5)/15

Which of the following is/are not Pythagorean triplet (s)? 3,4,5 (b) 8,15,17 7,24,25 (d) 13,26,29

3/7 xx 7/17