1
GATE ME 2009
MCQ (Single Correct Answer)
+1
-0.3
If three coins are tossed simultaneously, the probability of getting at least one head is
A
$$1/8$$
B
$$3/8$$
C
$$1/2$$
D
$$7/8$$
2
GATE ME 2009
MCQ (Single Correct Answer)
+1
-0.3
The standard deviation of a uniformly distributed random variable $$b/w$$ $$0$$ and $$1$$ is
A
$${1 \over {\sqrt {12} }}$$
B
$${1 \over {\sqrt {3} }}$$
C
$${5 \over {\sqrt {12} }}$$
D
$${7 \over {\sqrt {12} }}$$
3
GATE ME 2008
MCQ (Single Correct Answer)
+1
-0.3
A coin is tossed $$4$$ times. What is the probability of getting heads exactly $$3$$ times?
A
$$1/4$$
B
$$3/8$$
C
$$1/2$$
D
$$3/4$$
4
GATE ME 2005
MCQ (Single Correct Answer)
+1
-0.3
A lot had $$10$$% defective items. Ten items are chosen randomly from this lot. The probability that exactly $$2$$ of the chosen items are defective is
A
$$0.0036$$
B
$$0.1937$$
C
$$0.2234$$
D
$$0.3874$$
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