1
GATE ECE 2018
MCQ (Single Correct Answer)
+2
-0.67
Two alloys A and B contain gold and copper in the ratios of 2 : 3 and 3 : 7 by mass, respectively. Equal masses of alloys A and B are melted to make an alloy C. The ratio of gold to copper in alloy C is
A
6 : 11
B
5 : 10
C
7 : 13
D
9 : 13
2
GATE ECE 2018
MCQ (Single Correct Answer)
+2
-0.67
Leila aspires to buy a car worth Rs. 10,00,000 after 5 years. What is the minimum amount in Rupees that she should deposit now in a bank which offers 10% annual rate of interest, if the interest was compounded annually?
A
5,00,000
B
6,21,000
C
6,66,667
D
7,50,000
3
GATE ECE 2018
MCQ (Single Correct Answer)
+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%
4
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.67
Each of P, Q, R, S, W, X, Y and Z has been married at most once. X and Y married and have two children P and Q, Z is grandfather of the daughter ‘S’ of P. Further Z and W married and are parents of R. Which one of the following must necessarily be FALSE?
A
X is the mother in law to R
B
P and R are not married to each other
C
P is son of X and Y
D
Q cannot be married to R
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