Average on Arithmetic Aptitude related Questions and Answers

Question 1 : In a boat there are 8 men whose average weight is increased by 1 kg when 1 man of 60 kg is replaced by a new man. What is weight of new comer?
1. 70
2. 66
3. 68
4. 69
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Question 2 : The average of 25 results is 18. The average of first 12 of those is 14 and the average of last 12 is 17. What is the 13th result?
1. 74
2. 75
3. 69
4. 78
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Question 3 : A train covers the first 16 km at a speed of 20 km per hour another 20 km at 40 km per hour and the last 10 km at 15 km per hour. Find the average speed for the entire journey.
1. 24 km
2. 26 km
3. 21 km
4. 23(23/59) km
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Question 4 : The average monthly salary of 660 workers in a factory is ₹ 380. The average monthly salary of officers is ₹ 2100 and the average monthly salary of the other workers is ₹ 340. Find the number of other workers.
1. 645
2. 650
3. 640
4. 642
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Question 5 : The average mark of four subjects is 120. If 33 was misread as 13 during calculation, what will be the correct average?
1. 122
2. 120
3. 125
4. 121
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Question 6 : Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, pass average of 15 students of second class was 60% and pass average of 25 students of third class was 80% then what will be the pass average of all students of three classes?
1. 74%
2. 75%
3. 69%
4. 72%
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Question 7 : A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average for whole journey.
1. 24
2. 25
3. 27
4. 28
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Question 8 : Five years ago, the average age of A, B, C and D was 45 yr. with E joining them now, the average of all the five is 49 yr. How old is E?
1. 25 yr
2. 40 yr
3. 45yr
4. 64 yr
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Question 9 : Average of 80 numbers are 42. 5 more numbers included, the average of 85 numbers become 45. Find the average of 5 numbers.
1. 82
2. 89
3. 93
4. 98
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Question 10 : A cricketer scored some runs in his 21st innings, as a result, his average runs increased by 3. If the present average run is 40, how many runs he scored in the final innings?
1. 103
2. 100
3. 85
4. 82
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