Problems on Ages
Problems on Ages - 1 Problems on Ages - 2 Problems on Ages - 3 Problems on Ages - 4Problems on Average
Problems on Average - 1 Problems on Average - 2 Problems on Average - 3Odd Man Out Series
Odd Man Out Series - 1 Odd Man Out Series - 2 Odd Man Out Series - 3 Odd Man Out Series - 4Problems on Percentage
Problems on Percentage - 1 Problems on Percentage - 2 Problems on Percentage - 3 Problems on Percentage - 4 Problems on Percentage - 5Permutation and Combination
Permutation and Combination - 1 Permutation and Combination - 2 Permutation and Combination - 3Problems on Probability
Problems on Probability - 1 Problems on Probability - 2 Problems on Probability - 3 Problems on Probability - 4Problems on Profit Loss
Profit and Loss - 1 Profit and Loss - 2 Profit and Loss - 3 Profit and Loss - 4 Profit and Loss - 5 Profit and Loss - 6Problems on Test Divisibility
Test Divisibility - 1 Test Divisibility - 2 Test Divisibility - 3Time and Work
Time and Work - 1 Time and Work - 2 Time and Work - 3The ones who are crazy enough to think they can change the world are the ones who do.- Steve Jobs
Problems on Average
Average - Aptitude
6. The average weight of 10 oarsmen in a boat is increased by 1.5 kg when one of the crew, who weighs 50 kg is replaced by a new man.Find the weight of the new man.
x
Option: C
Explanation
Total weight increased = (1.5 * 10)kg = 15 kg
Weight of new man = (50 + 15)kg = 65 kg
7. A batsman makes a score of 77 runs in the 15th inning and thus increases his average by 3.Find his average after 15th inning.
x
Option: B
Explanation
Let the average after 15th inning = X
then, the average after 14th inning = (X - 3)
i.e) 14(X - 3) + 77 = 15X
14X + 35 = 15X
Batsman's average afer 15th inning X = 35
8. Five persons went to a hotel for taking their meals. Four of them spent Rs.10 each on their meals and the fifth spent Rs.8 more than the average expenditure of all the five. What was the total money spent by them.
x
Option: B
Explanation
Let the average expenditure of all the five be Rs.x
Then, (10 * 4) + (x + 4) = 5x
40 + x + 4 = 5x
4x = 44
x = 11
Total money spent = 5x = (5 * 11) = Rs.55
9. There were 35 students in a hostel. Due to the admission of 7 new students, the expenses of the mess were increased by Rs.42 per day while the average expenditure per head diminished by Re.1. What was the original expenditure of the mess?
x
Option: B
Explanation
Let the original average expenditure be Rs.x
Then, 42(x - 1) - 35x = 42
7x = 84
x = 12
Original expenditure = Rs.(35 * 12) = Rs.420
10. Distance between two stations A and B is 778 km. A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56 km per hour. Find the average speed of the train during the whole journey.
x
Option: A
Explanation
Average Speed =
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