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Quantitative Aptitude0%

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Question 1 of 10

1. Question

1 points

Category: Quantitative Aptitude

A train crosses a man going along a railway track at 6 km/hr. The man could see the train up to 2 minutes and then find the speed of train in km/hr if at the time of disappearance, the distance between train to the man was 1.8 km and length of train is 300 m?

Correct

Explanation
Distance covered by man in 2 min = 200m
Total distance by train =200+1800+300=2300m(2.3km)
Time =1/30 hr (2min)
Speed of train=2.3 / (1/30) = 69 km/hr

Incorrect

Explanation
Distance covered by man in 2 min = 200m
Total distance by train =200+1800+300=2300m(2.3km)
Time =1/30 hr (2min)
Speed of train=2.3 / (1/30) = 69 km/hr

Question 2 of 10

2. Question

1 points

Category: Quantitative Aptitude

Correct

Incorrect

Question 3 of 10

3. Question

1 points

Category: Quantitative Aptitude

what should be the next number in this series?
68, 73, 141, 214, 355, 569?

Average of class 9th students in year 2016 for all schools’ what percent of students of class 9th in 2016 in school B?

Correct

Explanation
Average of 9th class students in 2016=130
Percentage of school B= (130/140) *100=92.86

Incorrect

Explanation
Average of 9th class students in 2016=130
Percentage of school B= (130/140) *100=92.86

Question 9 of 10

9. Question

1 points

Category: Quantitative Aptitude

Anju was calculating average of 20 ‘three-digit numbers. But due to mistake she reversed the digits of a number and thus her average increase by 19.8. The difference between the unit digit and hundred’s digit of that number?

Correct

Explanation
Let digit is 100a+10b+c but due to mistake digit changed into 100c+10b+a and difference between these two digits is 99a-99c which is
99a-99c=19.8×20
a-c=4

Incorrect

Explanation
Let digit is 100a+10b+c but due to mistake digit changed into 100c+10b+a and difference between these two digits is 99a-99c which is
99a-99c=19.8×20
a-c=4

Question 10 of 10

10. Question

1 points

Category: Quantitative Aptitude

A bag contains 4 black balls, 3 red balls and 5 green balls. 2 balls are drawn from the bag at random. What is probability that both balls are of same color?

Correct

Explanation

Total no of balls=4+3+5=12
Total possible event=^{12}c_{2}=66
Desired events=^{4}C_{2}+^{3}C_{2}+^{5}C_{2}=6+3+10=19
Probability=19/66

Incorrect

Explanation

Total no of balls=4+3+5=12
Total possible event=^{12}c_{2}=66
Desired events=^{4}C_{2}+^{3}C_{2}+^{5}C_{2}=6+3+10=19
Probability=19/66