# In a ∆ABC ,  ∑(b+c) tan a/2 tan(b-c)/2  is equal to

1.  a

2.  b

3.  c

4.  0

4

0

Explanation :
No Explanation available for this question

# Two sides of a triangle are given by the roots of the  equation  x2-5x+6=0 and the angle between the sides is π/3  then the perimeter of the triangle is

1.  5 + √2

2.  5 + √3

3.  5 + √5

4.  5 + √7

4

5 + &#8730;7<br>

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Observe the following statements : A : Three vectors are coplanar if one of them is expressible as a linear combination of

1.  Both A and R are true and R is the correct explanation of A

2.  Both A and R are true but R is not the correct explanation of A

3.  A is true, but R is false

4.  A is false, but R is true

4

Both A and R are true but R is not the correct explanation of A

Explanation :
No Explanation available for this question

# A coin and six faced die, both unbiased, are thrown simultaneously. The probability of getting a head on the coin and an odd number on the die, is

1.  1/2

2.  3/4

3.  1/4

4.  2/3

4

3/4

Explanation :
No Explanation available for this question

# A number n is chosen at random from  S = {l,2,3,....,50}. Let  A = {n ε S:  n + 50/n > 27} and B = { n ε S: n is a prime number} and C = {n ε S: n is a square}.The corr

1.  P(A) < P(B) < P(C)

2.  P(A) > P(B) > P(C)

3.  P(B) < P(A) < P(C)

4.  P(A) > P(C) > P(B)

4

P(A) &gt; P(B) &gt; P(C)

Explanation :
No Explanation available for this question

# Box A contains 2 black and 3 red balls, while Box B contains 3 black and 4 red balls. Out of these two boxes one is selected at random; and the probability of choosing Box A is double that of Box B. If a red ball is drawn from th

1.  21/41

2.  10/31

3.  12/31

4.  13/41

4

12/31

Explanation :
No Explanation available for this question

# If the range of a random variable X is {0, 1, 2, 3, 4,........} with P(X = k) = (k+1)a / 3k for k ≥ 0 then a is equal to

1.  2 / 3

2.  4 / 9

3.  8 / 27

4.  16 / 81

4

8 / 27

Explanation :
No Explanation available for this question

# For a binomial variate X with n = 6, if P(X = 2) = 9P(X = 4), then its variance is

1.  8 / 9

2.  1 / 4

3.  9 / 8

4.  4

4

9 / 8

Explanation :
No Explanation available for this question

# If a point P moves such that its distances from the point A (1, 1) and the line x+ y + 2 = 0 are equal, then the locus of  P is

1.  a straight line

2.  a pair of straight lines

3.  a parabola

4.  an ellipse

4