# The locus of the middle points of the chords of the circle x2+y2=8 which are at a distance of √2 units from the centre of circle is

1.  x2+y2=1/2

2.  x2+y2=4

3.  x2+y2=1

4.  x2+y2=2

4

x2+y2=2

Explanation :
No Explanation available for this question

# The locus of the midpoint of the chord of the circle x2+y2=25 which passes through the fixed point (4,6) is a circle. The radius of that circle is

1.  √10

2.  √13

3.  √2

4.  √52

4

√13

Explanation :
No Explanation available for this question

# If (1,2) is the midpoint of a chord of the circle (x-2)2+(y-4)2=10 and the equation of the chord is ax+by+c=0(a>0) then a-b+c=

1.  2

2.  -2

3.  -6

4.  6

4

-6

Explanation :
No Explanation available for this question

# The locus of the middle points of chords of length 4 on the circle x2+y2=16 is

1.  An ellipse

2.  A circle of radius 2√3

3.  A circle of radius √3

4.  A straight line

4

Explanation :
No Explanation available for this question

# If for a Binomial distribution the mean is 6 and standard deviation is 1/√2,then the probability of success is

1.  11/12

2.  10/12

3.  9/12

4.  8/128/12

4

11/12

Explanation :
No Explanation available for this question

# The mean and varience of B.D are 6,4.The parameters of the distribution

1.  12,1/2

2.  9,2/3

3.  10,0.6

4.  18,1/3

4

18,1/3

Explanation :
No Explanation available for this question

# Six unbiased coins are tossed once.The probability of obtaining atleast two heads is

1.  63/64

2.  57/64

3.  1/64

4.  1/32

4

57/64

Explanation :
No Explanation available for this question

# A fair coin is tossed four times.The probability that tails exceed heads in number is

1.  1/4

2.  5/16

3.  7/16

4.  9/16

4

5/16

Explanation :
No Explanation available for this question

# If for a binomial distribution n=4 and 6P(X=4)=P(X=2),the probability of success is

1.  3/4

2.  1/2

3.  1/3

4.  1/4

4

1/2

Explanation :
No Explanation available for this question

1.  4

2.  3

3.  2

4.  1

4