It rained as much on Wednesday as on all the others days of the week combined. If the average rainfall for the whole week was $3 \,cm $ then how much did it rain on Wednesday? (in $cm$)
$2.625$
$3$
$10.5$
$15$
The average age of a class of $30$ students and a teacher reduce by $0.5 \,years$ if we exclude the teacher. If the initial average is $14 \,years,$ find the age of the class teacher in $year$ ?
The average monthly salary of all the employees in an industry is $Rs.\, 12,000$. The average salary of male employees is $Rs.\,15,000$ and that of female employees is $Rs.\, 8,000 .$ What is the ratio of male employees to female employees?
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 weight of $10$ students is increased by half a $kg$ when one of the students weighing $50\, kg$ is replaced by a new student. Find out the weight of the new student.(in $kg$)
In a family, the average age of father and mother is $38\, year$ whereas the average age of father, mother and their only daughter is $28\, year.$ Then, the age of the daughter is? (in $year$)