The average monthly income of $P$ and $Q$ is $Rs.\,5050.$ The average monthly income of $Q$ and $R$ is $Rs.\,6250$ and the average monthly income of $P$ and $R$ is $Rs.\,5200.$ The monthly income of $P$ is
$3500$
$4000$
$4050$
$5000$
The average marks of $40$ students in an examination was $25 .$ It was later found that the marks of one student had been wrongly entered as $73$ instead of $37.$ What is the value of correct average
The average marks obtained by $40$ students of a class is $86 .$ If the $5$ highest marks are removed, the average reduces by one mark. The average marks of the top $5$ students is
The frequency distribution date is given below. If the average age is $17\, years,$ the value of $m$ is Age
Age (in $years$) | : | 8 | 20 | 26 | 29 |
Number of People | : | 3 | 2 | m | 1 |
A person travelled from one place to another at an average speed of $40 \,km / h$ and back to the original place at an average speed of $50\, km / h$. What is his average speed in $km / h$ during the entire trip?
The sum of three numbers is $98 .$ If the ratio between first and second be $2: 3$ and between second and third be $5: 8,$ then the second number is