1
GATE PI 2008
MCQ (Single Correct Answer)
+1
-0.3
For a random variable $$\,x\left( { - \infty < x < \infty } \right)\,\,$$ following normal distribution, the mean is $$\,\mu = 100\,\,.$$ If the probability is $$\,\,P = \alpha \,\,$$ for $$\,\,x \ge 110.\,\,\,$$ Then the probability of $$x$$ lying $$b/w$$ $$90$$ and $$110$$ i.e., $$\,P\left( {90 \le x \le 110} \right)\,\,$$ and equal to
A
$$\,1 - 2\alpha$$
B
$$\,1 - \alpha$$
C
$$1 - \alpha /2$$
D
$$2\,\alpha$$
2
GATE PI 2008
MCQ (Single Correct Answer)
+1
-0.3
The solutions of the differential equation $${{{d^2}y} \over {d{x^2}}} + 2{{dy} \over {dx}} + 2y = 0\,\,$$ are
A
$${e^{ - \left( {1 + i} \right)x}},{e^{ - \left( {1 - i} \right)x}}$$
B
$${e^{\left( {1 + i} \right)x}},\,\,{e^{\left( {1 - i} \right)x}}$$
C
$${e^{ - \left( {1 + i} \right)x}},\,\,{e^{\left( {1 + i} \right)x}}$$
D
$${e^{\left( {1 + i} \right)x}},\,\,{e^{ - \left( {1 + i} \right)x}}$$
3
GATE PI 2008
MCQ (Single Correct Answer)
+1
-0.3
The value of the expression $${{ - 5 + 10i} \over {3 + 4i}}$$ is
A
$$1 - 2i$$
B
$$1 + 2i$$
C
$$2 - i$$
D
$$2 + i$$
4
GATE PI 2008
MCQ (Single Correct Answer)
+1
-0.3
Laplace transform of $$8$$ $${t^3}$$ is
A
$${8 \over {{s^4}}}$$
B
$${{16} \over {{s^4}}}$$
C
$${{24} \over {{s^4}}}$$
D
$${{48} \over {{s^4}}}$$
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