1
GATE ECE 2018
+2
-0.67
A cab was involved in a hit and run accident at night. You are given the following data about the cabs in the city and the accident.

(i) 85% of cabs in the city are green and the remaining cabs are blue.

(ii) A witness identified the cab involved in the accident as blue.

(iii) It is known that a witness can correctly identify the cab colour only 80% of the time.

Which of the following options is closest to the probability that the accident was caused by a blue cab?
A
41%
B
15%
C
12%
D
80%
2
GATE ECE 2017 Set 1
+2
-0.67
S, T, U, V, W, X, Y and Z are seated around a circular table. T's neighbors are Y and V. Z is seated third to the left of T and second to the right of S. U's neighbors are S and Y: and T and W are not seated opposite each other. Who is third to the left of V?
A
X
B
W
C
U
D
T
3
GATE ECE 2017 Set 1
+2
-0.67
There are 3 Indians and 3 Chinese in a group of 6 people. How many subgroups of this group can we choose so that every subgroup has at least one Indian?
A
52
B
56
C
48
D
44
4
GATE ECE 2017 Set 1
+2
-0.67
A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region. Contour lines are shown at 25 m intervals in this plot.

The path from P to Q is best described by
A
Up-Down-Up-Down
B
Down-Up-Down-Up
C
Down-Up-Down
D
Up-Down-Up
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