SSC MTS (AVERAGE) MATH QUIZ

In world cup Champions, Rohit scored an average of 120 runs per match in the first 3 match and an average of 140 runs per match in the last four match. What is Rohit's average runs for the first match and the last two match if his average runs per match for all the five match is 122 and total number of matches are 5 ?

In a class, there are 15 students at the age of 18 years, 12 students at the age of 23 years and 7 students at the age of 13 years. What is the average age of a student?

The average of 21, 28 and $x$ is 54. What is the value of $\mathrm{x}$?

Find the average of $\frac{1+2^{2}+3^{2}+\cdots 10^{2}}{1+2+3+\cdots 10}$

The average of thirteen numbers is 47. The average of the first three numbers is 39 and that of next seven numbers is 49. The 11th number is two times the 12th number and 12th number is 3 less than the 13th number. What is the average of 11th and 13th numbers?

Average age of $A, B$ and $C$ is 34 years, 7 years ago, average age of $A$ and $C$ was 23 years. If $B$ is 10 years older than $\mathrm{C}$, then find the age of A. (in years)

Average of three numbers is 48. If ratio of smallest number to largest number is 13 : 32 while the sum of smallest and second smallest number is 80, find the difference between largest number and smallest number ?

The average number of electronic items sold by a trader in 2004, 2005, 2006 and 2007 is 18950 and that sold in 2005, 2006, 2007 and 2008 is 21725. If the number of items sold in 2008 is 12750, then the number of items sold in 2004 is:

The average age of $66 \frac{2}{3} \%$ of the number of children in a group is 13 years. The average age of all the children in the group is $14.5$ years. What is the average age (in years) of the remaining children?