The average of first nine prime numbers is
$9$
$11$
$11 \frac{2}{9}$
$11 \frac{1}{9}$
Average of First $9$ prime Number
$=\frac{2+3+5+7+11+13+17+19+23}{9}=\frac{100}{9}=11 \frac{1}{9}$
The average marks of $120$ students are $35.$ If average of passed students was $39$ and failed students was $15,$ then Find the number of students who have passed?
A cricketer whose bowling average is $12.4$ runs per wicket takes $5$ wickets for $26$ runs and thereby decreases his average by $0.4$ The number of wickets taken by him till the last match was
$12 \%$ of Kaushal's monthly salary is equal to $16 \%$ of Nandini's monthly salary. Suresh's monthly salary is half that of Nandini's monthly salary. If Suresh's annual salary is $Rs.\,1.08$ $lacs.$ What is Kaushal's monthly salary? (in $Rs.$)
The average age of $15$ students of a class is $15\, year.$ Oute of these, the average age of $5$ students is $14 \,year$ and that of the other $9$ students is $16\, year.$ The age of the $15^{th}$ students is? (in $year$)
The average age of $A, B, C, D$ five years ago was $45\, years.$ By including $x$, the present average age of all the five is $49\, years.$ The present age of $x$ is (in $years$)
