The average temperature from Monday to Thursday is $48^{\circ} C$ and from Tuesday to Friday, the average temperature is $52^{\circ} C$. If the temperature on Monday is $42^{\circ} C$, what was it on Friday in $^{\circ} C$?
$46$
$58$
$50$
$45$
The average of the boys in a class is $16\, years$ and that of girls is $15\, years.$ The average age for the whole class is
The average of $25$ consecutive odd integers is $55 .$ The highest of these integers is
What is the average of all numbers between $100$ and $200$ which are divisible by $13\, ?$
In an examination average marks obtained by the girls of a class is $85$ and the average marks obtained by the boys of the same class is $87 .$ If the girls and boys are in the ratio $4: 5,$ average marks of the whole class $(approx.)$ is closest to
The average speed of a cyclist who covers first, second and third km at $20,16$ and $12\, km / hr$ respectively ( in $km / hr )$ is