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AFCAT || Numerical_Ability || Average_Quiz

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Question 1

The average of 13 numbers is 11.9. if the average of first 7 numbers is 11.5 and that of the last 7 numbers is 12.4, then the middle number is:

Question 2

The average weight of J, K and L is 67 kg. If M joins the group then the average becomes 71 kg. when N replaces J the average weight becomes 68 kg. what is the average weight of K, L and N?

Question 3

A batsman’s score for an innings was 2.5 times the average of his score in the first two innings. If his average score in the three innings put together was 90, what was his core in the third inning?

Question 4

In a college having 120 students, 58 are in finance, 39 are in marketing, 9 are in HR and the rest are in operation. In accounting test, the average mark scored by the student from finance, marketing, HR, and operations are 91, 84, 69, and 87 respectively. What are the average marks in accounting for the batch?

Question 5

The average of 27 samples is 19 . The average of 1st 13 of them is 15 & last 13 is 18 . Find the 14th sample.

Question 6

The average of four consecutive odd numbers is 30; find the largest of these numbers?

Question 7

The average age of a class of 49 students is 17 years. If the age of the teacher he included, then the average increases by 6 months. Find the age of the teacher.

Question 8

A man spends in 6 months as much as he earns in 3 months. He saves Rs. 7500 in a year. His average monthly income is :

Question 9

The average of 40 numbers is calculated as 45. It is discovered later that while calculating the average, one number, namely 71 was mis-read as 31. The correct average is :

Question 10

The average height of 50 students of a class is 152 cm. If 10 among them whose average height is 148cm left the class and 10 new boys of average height 150 cm are included in the class, then what will be the new average height of the students of the class?
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Nov 14CDS & Defence Exams