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 2
MCQ (Single Correct Answer)
+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.
Which of the following is the steepest path leaving from P?
A
P to Q
B
P to R
C
P to S
D
P to T
3
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.67
1200 men and 500 women can build a bridge in 2 weeks. 900 men and 250 women will take 3 weeks to
build the same bridge. How many men will be needed to build the bridge in one week?
A
3000
B
3300
C
3600
D
3900
4
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.67
The number of 3 digit numbers such that the digit 1 is never to the immediate right of 2 is
