Question 11 : 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 12 : 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 13 : 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 14 : 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 15 : 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 16 : 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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