Average Questions

The average revenues of 7 consecutive years of a company is Rs 75 lakhs. If the average of first 4 years is Rs 70 lakhs and that of last 4 years is Rs 82 lakhs, what will be the revenue for the 4th year.

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

In a cricket match, the scores of the players are considered such that coefficient of variation of scores is 16 and mean is 25 then the variance is

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

Two students appeared for an examination. One of them secured 26 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first 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?

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is