# If a coin is so biased that head is thrice as likely to appear as tail, then the probability of head is

1.  1/8

2.  3/4

3.  1/2

4.  1/4

4

3/4

Explanation :
No Explanation available for this question

# An unbiased coin is tossed n times. The probability that head will present itself, even number of times is

1.  1/5

2.  1/2

3.  1/3

4.  1/4

4

1/2

Explanation :
No Explanation available for this question

# When a perfect die is rolled, the probability of getting a face with 4 or 5 points upward is

1.  1/4

2.  1/2

3.  2/3

4.  1/3

4

1/3

Explanation :
No Explanation available for this question

# Two symmetrical dice are thrown. The probability of getting a sum of 6 points is

1.  1/36

2.  6/36

3.  5/36

4.  4/36

4

5/36

Explanation :
No Explanation available for this question

# The points at which the tangent to the circle x2+y2=13 is perpendicular to the line 2x+3y+21=0 is

1.  (2,3)

2.  (2,-3)

3.  (3,-2)

4.  (3,2)

4

(3,-2)

Explanation :
No Explanation available for this question

# Two dice are thrown. The probability that the absolute difference of points on them is 4 is

1.  1/6

2.  1/9

3.  1/8

4.  1/7

4

1/9

Explanation :
No Explanation available for this question

# The centre of the circle x2+y2-2x-4y-20=0 is C.If the tangents to the circle at A(1,7) and B(4,-2) intersect at P then area of the quadrilateral PACB is

1.  25

2.  25√3

3.  75

4.  15

4

75

Explanation :
No Explanation available for this question

# The probability of getting at least an ace when two dice are rolled is

1.  1/8

2.  1/6

3.  25/26

4.  11/36

4

11/36

Explanation :
No Explanation available for this question

# The slopes of the lines passing through A(2,0) and making an angle of 450 with the tangent at A to the circle x2+y2+4x-6y-12=0 is

1.  1/3,-3

2.  2,-1/2

3.  -2,-1/2

4.  1/7,-7

4

1/7,-7

Explanation :
No Explanation available for this question

1.  3/54

2.  1/54

3.  5/54

4.  5/27

4