# If the mean of a poisson distibution is 1/2,then the ratio of P(X=3) to P(X=2) is:

1.  1:2

2.  1:4

3.  1:6

4.  1:8

4

1:6

Explanation :
No Explanation available for this question

# The maximum value of c+2bx-x2 is equal to

1.  b2c

2.  b2-c

3.  c-b2

4.  b2+c

4

b<sup>2</sup>+c

Explanation :
No Explanation available for this question

# Ifthen A(α), A(β) is equal to :

1.  A(α – β)

2.  A(α) - A(β)

3.  A(α) + A(β)

4.  A(α + β)

4

A(α + β)

Explanation :
No Explanation available for this question

# A random variable X takes the values 0,1 and 2.If (X=1)=P(X=2) and P(X=0)=0.4,then the mean of the random variable X is:

1.  0.2

2.  0.7

3.  0.5

4.  0.9

4

0.9

Explanation :
No Explanation available for this question

# The real part of

1.  2 cosα

2.  2 sinβ

3.  0

4.  1

4

0

Explanation :
No Explanation available for this question

# If the matrixis singular, then θ =

1.  π

2.  π/2

3.  π/3

4.  π/4

4

π/4

Explanation :
No Explanation available for this question

# If x ≠ 0 andthen x is equal to :

1.  -1

2.  -2

3.  1

4.  2

4

-1

Explanation :
No Explanation available for this question

# Let f(x) = ex,g(x) = sin-1x and h(x) = f(g(x)), then h'(x)/h(x) is equal to

1.  sin -1 x

2.  1/√(1-x2)

3.  -1/√(1-x2)

4.

4

1/√(1-x2)

Explanation :
No Explanation available for this question

# If f(x) = √ax + a2/√ax, then f'(a) =

1.  a

2.  0

3.  1

4.  -1

4

0

Explanation :
No Explanation available for this question

1.

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4.

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