A man retired from his service at the age of $60$ He served for $\frac{3}{5}^{ th}$ years of his retirement age. He joined his job at the age of (in $years$)
$18$
$20$
$24$
$36$
The average of three numbers is $154 .$ The first number is twice the second and the second number is twice the third. The first number is
The average of husband, wife and their child $3\, years$ ago was $27\, years$ and that of wife and the child $5\, years$ ago was $20\, years.$ The present age of the husband is (in $years$)
Last year, $5$ companies had an average of $16$ non working days each, and $2$ companies had $5$ fewer non working days each. What was the average number of non working days given by the same companies this $year$ ?
The mean of $11$ numbers is $35 .$ If the mean of first $6$ numbers is $32$ and that of the last $6$ numbers is $37,$ then find the sixth number.
A batsman has an average of $30$ runs in his $42$ inning. The difference between his maximum and minimum score is $100 .$ If these two innings are removed his average for $40$ innings comes down to $28 .$ What is his minimum score?