# The sum of the slopes of the tangents to the circle x2+y2=1 from (2,3) is

1.  4

2.  3

3.  2

4.  2/3

4

4

Explanation :
No Explanation available for this question

# The number of ways of dividing 15 books into 3 groups of 3,4,8 books respectively is

1.  13C312C48C8

2.  15!/4!8!

3.  15!/(3!)24!8!

4.  15!/2!3!4!8!

4

13C312C48C8

Explanation :
No Explanation available for this question

# A question paper contains 5 questions each having an alternative. The number of ways that a student can answer one or more questions is

1.  32

2.  243

3.  242

4.  31

4

242

Explanation :
No Explanation available for this question

# If c(2n,3):c(n,2)=12:1 then n=

1.  8

2.  6

3.  5

4.  4

4

5

Explanation :
No Explanation available for this question

# The number of positive factors of 2520 excluding unity is

1.  47

2.  46

3.  45

4.  48

4

47

Explanation :
No Explanation available for this question

# In constructing a problem on vectors the components are drawn from {0,1,2,3,4,5} the number of ways of getting the magnitude of a vector as ‘5’ is

1.  26

2.  35

3.  18

4.  9

4

9

Explanation :
No Explanation available for this question

# The number of diagonals for an n sided polygon is

1.  n(n-3)/2

2.  n(n-1)

3.  n(n-1)(n-2)/6

4.  n(n-1)/2

4

n(n-3)/2

Explanation :
No Explanation available for this question

# If a polygon of n sides has 275 diagonals,then n=

1.  15

2.  20

3.  35

4.  25

4

25

Explanation :
No Explanation available for this question

# In a polygon no three diagonals are concurrent.If the total number of points of intersection of diagonals interior to the polygon is 35 and the number of diagonals is x,number of sides is y then (y,x)=

1.  (7,14)

2.  (5,20)

3.  (6,9)

4.  (5,5)

4

(7,14)

Explanation :
No Explanation available for this question

1.  11C5(9!)2

2.  11C3(9!)2

3.  11C4(9!)2

4.  (9!)2

4