1
GATE ME 2014 Set 2
Numerical
+2
-0
Consider an unbiased cubic die with opposite faces coloured identically and each face coloured red, blue or green such that each color appears only two times on the die. If the die is thrown thrice, the probability of obtaining red colour on top face of the die at least twice is ________.
2
GATE ME 2014 Set 1
+2
-0.6
In the following table, $$x$$ is a discrete random variable and $$p(x)$$ is the probability density. The standard deviation of $$x$$ is
A
$$0.18$$
B
$$0.36$$
C
$$0.54$$
D
$$0.6$$
3
GATE ME 2014 Set 3
+2
-0.6
A machine produces $$0, 1$$ or $$2$$ defective pieces in a day with associated probability of $${1 \over 6},{2 \over 3}$$ and $${1 \over 6}$$, respectively. Then mean value and the variance of the number of defective pieces produced by
A
$$1$$ and $$1/3$$
B
$$1/3$$ and $$1$$
C
$$1$$ and $$4/3$$
D
$$1/3$$ and $$4/3$$
4
GATE ME 2013
+2
-0.6
The probability that a student knows the correct answer to a multiple choice question is $${2 \over 3}$$. If the student does not know the answer, then the student guesses the answer. The probability of the guessed answer being correct is $${1 \over 4}$$. Given that the student has answered the question correctly, the conditional probability that the student knows the correct answer is
A
$${2 \over 3}$$
B
$${3 \over 4}$$
C
$${5 \over 6}$$
D
$${8 \over 9}$$
GATE ME Subjects
EXAM MAP
Medical
NEET