Average Questions

The mode of the data 12, 1, 10, 1, 9, 3, 4, 9, 7, 9 is

The average marks obtained by Raghav in 12 tests is 24. Zubeida has maintained an average of 23 so far but has taken only 9 of the tests. If each test is out of 30, at least how much Zubeida score in any one of the remaining three tests to still have a chance to match Raghav's performance?

The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number?

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 396, then what is the difference between the first and the third number?

There are a total of 200 students in a school, of which 7/10th are boys. Find the number of girls in the school.

Among three numbers, the first is twice the second and thrice the third, If the average of three numbers is 517, then what is the difference between the first and the third number?

The median of the numbers 14, 12, 12, 16, 13 and 18 is

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.