The average of $50$ numbers is $38 .$ If two numbers, namely, $45$ and $55$ are discarded, what is the average of the remaining numbers ?
$37.5$
$38.5$
$39.5$
$36.5$
$A, B, C$ and $D$ are four consecutive odd numbers and their average is $42 .$ What is the product of $B$ and $D$ ?
If the average of the ages of Rakesh and Mohan is $15,$ average of the ages of Mohan and Ramesh is $12$ and the average of the ages of Rakesh and Ramesh is $13,$ then the age of Mohan, is?
The average price of $80$ computers in an electronic shop is $Rs.\, 30,000 .$ If the highest and lowest price computers are sold out then the average price of the remaining $78$ computers is $Rs.\, 29,500 .$ The cost of the highest price computer is $Rs.\, 80,000 .$ The cost of lowest price computer is in $Rs.$
The average age of mother, father and son was $42\, years.$ at the time of the marriage of the son. After one year an infant was born in the family and after $6\, years$ of marriage the average age of the family is $36\, years.$ What was the age of the bride at the time of marriage in $year.$
A batsman score $98$ runs in the $17^{\text {th }}$ match of his career. His average runs per match increase by $2.5$ What is his average before the $17^{\text {th }}$ match?