# The number of diagonals for n-sided polygen is:

1.   n(n-1)/2

2.  n(n-1)(n-2)/6

3.  n(n-1)

4.  n(n-3)/2

4

n(n-3)/2

Explanation :
No Explanation available for this question

# If C0, C2, C4,..... are binomial coefficient in the expansion of (1+x)9, then C0+C2+C

1.  27

2.  256

3.  29

4.  258

4

256

Explanation :
No Explanation available for this question

# If Tr denotes the rth term in the expansion of (x+1/x)23, then:

1.  T12=T13

2.  x2-T13= T12

3.  T12=x2T13

4.  T12+T13=25

4

x<sup>2</sup>-T<sub>13</sub>= T<sub>12</sub>

Explanation :
No Explanation available for this question

# If A=(-3, 4), B=(-1, -2), C=(5, 6) and D=(x, -4) are vertices of a quadrilateral such that ΔABD=2ΔACD, then x is:

1.  6

2.  9

3.  69

4.  96

4

69

Explanation :
No Explanation available for this question

# The angle between the lines xcosα+ysinα=p1, xcosβ+ysinβ=p2, where α>β is:

1.  α+β

2.  α-β

3.  αβ

4.  2α-β

4

&#945;-&#946;

Explanation :
No Explanation available for this question

# The foot of the perpendicular from the point (3, 4) on the line 3x-4y+5=0 is:

1.  (81/25, 92/25)

2.  (92/25, 81/25)

3.  (46/25, 54/25)

4.  (-81/25, 92/25)

4

(81/25, 92/25)

Explanation :
No Explanation available for this question

# If ax2+6xy+by2-10x+10y-6=0, represents a pair of perpendicular straight lines, then a is equal to:

1.  2

2.  4

3.  1

4.  3

4

4

Explanation :
No Explanation available for this question

# If in a binomial distribution the mean is 20 and standard deviation is √15. Then p is:

1.  3/4

2.  1/4

3.  1/2

4.  1/3

4

1/4

Explanation :
No Explanation available for this question

# If the mean is λ and the variance is σ2m a Poisson distribution, then:

1.  λ=1/2σ2

2.  σ2=1/2λ

3.  λ=σ2

4.  σ2=λ2

4

&#955;=&#963;<sup>2</sup>

Explanation :
No Explanation available for this question

1.  5

2.  10

3.  15

4.  20

4