Maths
General
Easy
Question
If Z = aX + bY and r is the correlation coefficient between X and Y, then is equal to 



 None of these
The correct answer is:
To find the variance of z.
Therefore, var(z) =
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The imaginary part of is
The imaginary part of is
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If the lines and are concurrent, then the value of l is
If the lines and are concurrent, then the value of l is
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A: The product of the perpendiculars from
B: The product of perpendiculars from (1,1) to the pair of lines
C: The product of perpendiculars from (0,0) to pair of lines
D: The square of the distance from (0,0) to the point of intersection of Arrange A,B,C,D in ascending order
A: The product of the perpendiculars from
B: The product of perpendiculars from (1,1) to the pair of lines
C: The product of perpendiculars from (0,0) to pair of lines
D: The square of the distance from (0,0) to the point of intersection of Arrange A,B,C,D in ascending order
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If the equation represents a pair of straight lines, then the square of the distance of their point of intersection from the origin is
If the equation represents a pair of straight lines, then the square of the distance of their point of intersection from the origin is
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denotes a pair of straight lines, then the point of intersection of the lines is
denotes a pair of straight lines, then the point of intersection of the lines is
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The point of intersection of the straight lines represented by
The point of intersection of the straight lines represented by
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The product of the perpendicular distances from the point (2, 3) to the lines
The product of the perpendicular distances from the point (2, 3) to the lines
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The distance between the two lines represented by
The distance between the two lines represented by
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The distance between the parallel lines
The distance between the parallel lines
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The distance between the parallel lines
The distance between the parallel lines
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represents a pair of parallel lines then
represents a pair of parallel lines then
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The equation of the pair of lines through the point (a, b) and parallel to the coordinate axes is
The equation of the pair of lines through the point (a, b) and parallel to the coordinate axes is
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The equation to the pair of lines through the origin perpendicular to the pair of lines
The equation to the pair of lines through the origin perpendicular to the pair of lines
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The equation when l is a real number, represents a pair of straight lines. If q is the angle between these lines, then
The equation when l is a real number, represents a pair of straight lines. If q is the angle between these lines, then
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The angle between the pair of lines
The angle between the pair of lines
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