There are 25 st5amps numbered from 1 to 25 in a box. If a stamp is drawn at random from the box, the probability that the number on the stamp will be a prime number is

1.  7/25

2.  8/25

3.  9/25

4.  6/25

View Answer  
4
Correct Answer :

9/25


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

View Answer  
4
Correct Answer :

1/7, -7


Explanation :
No Explanation available for this question

One letter is selected at random from the word PROBABILITY. The probability that it is a vowel is

1.  3/11

2.  4/11

3.  2/11

4.  5/11

View Answer  
4
Correct Answer :

4/11


Explanation :
No Explanation available for this question

If the lines represented by 4x2 +12xy+ 9y2-6x-9y=1 are two tangents to a circle then its area is

1.  5∏/13

2.  ∏

3.  ∏/2

4.  11/14

View Answer  
4
Correct Answer :

11/14


Explanation :
No Explanation available for this question

A lot consists of 12 good pencils, 6 with minor defects and 2 with major defects. A pencil is drawn at random. The probability that this pencil is not defective is

1.  3/5

2.  3/10

3.  2/5

4.  1/2

View Answer  
4
Correct Answer :

3/5


Explanation :
No Explanation available for this question

If the lines x+ky+3=0 and 2x-5y+7=0 intersects the coordinates axes in concyclic points then k =

1.  -2/5

2.  -3/5

3.  3/2

4.  -5/3

View Answer  
4
Correct Answer :

-2/5


Explanation :
No Explanation available for this question

In a book of 100 pages, if a page is opened at random, the probability that the number on it is a prime is

1.  1/2

2.  1/3

3.  1/4

4.  1/8

View Answer  
4
Correct Answer :

1/4


Explanation :
No Explanation available for this question

Equation of the circle with centre on Y-axis and passing through the points (1, 0), (1,1) is

1.  x2 + y2 -y-1=0

2.  x2 + y2 –x-1=0

3.  x2 + y2 –x+1=0

4.  x2 + y2 –y+1=0

View Answer  
4
Correct Answer :

x2 + y2 -y-1=0


Explanation :
No Explanation available for this question

A rod PQ of length 2a slides with its ends on the axis. Then the locus of the circumcentre of OPQ is

1.  x2 + y2 =2a2

2.  x2 + y2 =4a2

3.  x2 + y2 =3a2

4.  x2 + y2 =a2

View Answer  
4
Correct Answer :

x2 + y2 =a2


Explanation :
No Explanation available for this question

The probability that a number selected at random from the set of numbers {1,2,3,….100} is a cube is

1.  1/25

2.  2/25

3.  3/25

4.  4/25

View Answer  
4
Correct Answer :

1/25


Explanation :
No Explanation available for this question
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