The average of odd numbers upto $100$ is ?
$50.5$
$50$
$49.5$
$49$
Average odd Numbers upto $100$
$=\frac{1}{2}($ First Number $+$ Last Number $)=\frac{1}{2}(1+99)=\frac{1}{2} 100=50$
$16$ children are to be divided into two groups $A$ and $B$ of $10$ and $6$ children. The average percent marks obtained by the children of group $A$ is $75$ and the average per cent marks of all the $16$ children is $76 .$ What is the average per cent marks of children of group $B$ ?
A man spends $Rs.\, 1800$ monthly on an average for the first four months and $Rs. \,2000$ monthly for the next eight months and saves $Rs. \,5600$ a year. His average monthly income is (in $Rs.\,$)
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 $years$)
A cricketer gives $12.4$ runs per wicket. He gives $26$ runs and takes $5$ wicket in a match after which his average becomes $12$ per wicket. How many wickets had been taken till the last match?
The average of a non-zero number and its square is $5$ times the number. The number is
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