Average MCQs

The average of four consecutive even numbers is 15. The 2^nd highest number is :

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 13^th result?

A batsman makes a score of 270 runs in the 87^th inning and thus increase his average by a certain number of runs that is a whole number. Find the possible values of the new average.

A batsman makes a score of 84 runs in the 21^st inning and thus increases his average by 2 runs. His average after 21^st inning is-

The average of 25 numbers is 64. The average of the first 13 numbers and that of the last 13 numbers are 62.8 and 72.2, respectively. If the 12^th number is 61, and if the 12^th and 13^th numbers are excluded, then what is the average of the remaining number (correct to one decimal place)?

The mean of 9 observation is 16. One more observation is included and the new mean becomes 17. The 10^th observation is :

The average of thirteen numbers is 80. The average of the first five numbers is 74.5 and that of the next five numbers is 82.5. The 11^th number is 6 more than the 12^th number is 6 less than the 13^th number. What is the average of the 11^th and the 13^th numbers?

The following table shows the number of working hours and the number of employees employed in a small scale industry

No. of working hours	No. of employees
3 - 5	7
5 - 7	10
7 - 9	18
9 - 11	57
11 - 13	14
13 - 15	8

The average number of working hours of an employee is

The average marks obtained by 22 candidates in an examination are 45. The average marks of the first ten are 55 and that of the last eleven are 40. The number of marks obtained by the 11^th candidates is-