Quantitative Aptitude Average Questions 3

Quantitative Aptitude – Average Questions – 01

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1. The average age of 30 students of a class is 12 years. The average age of a group of 5 of the students is 10 years and that of another group of 5 of them is 14 years. What is the average age of the remaining students ?


2. The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is :


3. A class has two sections, in one of which there are 40 students with an average of 14.5 years. The average of the class is 14.2 years. If there be 32 students in the other section, its average age is :


4. Out of four numbers, the average of first three is 16 and that of the last three is 15. If the last number is 18, the first number is :


5. The average of 11 observations is 60. If the average of first five observations is 58 and that of the last five is 56, then the sixth observation is :


6. Mukesh has twice as much money as Sohan and Sohan has 50% more money than what Pankaj has. If the average money with them is Rs. 110, then Mukesh has :


7. In seven given numbers, the average of first four numbers is 4 and that of the last four numbers is also 4. If the average of these seven numbers is 3, the fourth number is :


8. The average of 25 results is 18. The average of first twelve of them is 14 and that of last twelve is 17. The thirteenth result is :


9. The average of six numbers is 30. If the average of first four is 25 and that of last three is 35, the fourth number is :


10. The mean of 100 abservations was calculated was 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct mean is :


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