1
GATE EE 2017 Set 2
Numerical
+1
-0
Assume that in a traffic junction, the cycle of the traffic signal lights is $$2$$ minutes of green (vehicle does not stop) and $$3$$ minutes of red (vehicle stops). Consider that the arrival time of vehicles at the junction is uniformly distributed over $$5$$ minute cycle. The expected waiting time (in minutes) for the vehicle at the junction is _________.
2
GATE EE 2015 Set 2
+1
-0.3
Two coins $$R$$ and $$S$$ are tossed. The $$4$$ joint events $$\,\,\,\,\,\,{H_R}{H_S},\,\,\,\,{T_R}{T_S},\,\,\,\,{H_R}{T_S},\,\,\,\,{T_R}{H_S}\,\,\,\,\,\,\,$$ have probabilities $$0.28,$$ $$0.18,$$ $$0.30,$$ $$0.24$$ respectively, where $$H$$ represents head and $$T$$ represents tail. Which one of the following is TRUE?
A
The coin tosses are independent
B
$$R$$ is fair, $$S$$ is not
C
$$S$$ is fair, $$R$$ is not
D
The coin tosses are dependent
3
GATE EE 2014 Set 1
+1
-0.3
A fair coin is tossed $$n$$ times. The probability that the difference between the number of heads and tails is $$(n-3)$$ is
A
$${2^{ - n}}$$
B
$$0$$
C
$${}^n{C_{n - 3}}{2^{ - n}}$$
D
$${2^{ - n + 3}}$$
4
GATE EE 2013
+1
-0.3
A continuous random variable $$X$$ has a probability density function $$f\left( x \right) = {e^{ - x}},0 < x < \infty .$$ Then $$P\left\{ {X > 1} \right\}$$ is
A
$$0.368$$
B
$$0.5$$
C
$$0.632$$
D
$$1.0$$
EXAM MAP
Medical
NEET