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 $)=\frac{1}{2}(1+99)=\frac{1}{2} 100=50$
With an average speed of $40\, km / h ,$ a train reaches its destination on time. If it goes with an average speed of $35 \,Km / h ,$ it reaches late by $15$ minutes. The total journey is (in $km$)
The sum of five numbers is $260 .$ The average of the first two numbers is $30$ and the average of the last two numbers is $70 .$ What is the third number ?
If the average of $m$ numbers is $n^{2}$ and that of $n$ numbers is $m^{2}$, then the average of $( m + n )$ numbers is
In a family, the average age of a father and a mother is $35\, years.$ The average age of the father, mother and their only son is $27\, years.$ What is the age of the son ? (in $years$)
The average of consecutive numbers is $n .$ If the next two consecutive numbers are also included, the average of the five numbers will
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