The average of runs of a cricket player of $10$ innings was $32 .$ How many runs must he score in his next innings so as to increase his average of runs by $4 ?$
$76$
$70$
$4$
$2$
Five years ago, the average age of $P$ and $Q$ was $15 \,year.$ Now, average age of $P , Q$ and $R$ is $20 \,year.$ What whould be the age of $R$ after $10$ $year$ in $year$ ?
The average of first three numbers is double of the fourth number. If the average of all the four numbers is $12,$ find the $4^{th}$ number.
The average pocket-money of $3$ friends $A, B, C$ is $Rs.\, 80$ $month.$ If $B$ spends double and $C$ spends triple of whate $A$ spends during that month and if the average of their unspent pocketemoney is $Rs.$ $60,$ then $A$ spends (in $Rs.$)
The daily maximum temperature in Delhi, for $7$ consecutive days in $May \,1988 ,$ were $42.7^{\circ} C , 44.6^{\circ} C$, $42.0^{\circ} C , 39.1^{\circ} C , 43.0^{\circ} C , 42.5^{\circ} C$ and $38.5^{\circ} C$. Find out the average daily maximum temperature. (in $^{\circ} C$)
The average age of four members of a family is $32\, years.$ If the age of a guest is included, then the average age increased by $12.5 \% .$ What is the age (in $years$) of the guest ?