Arihant Expert Team Solutions for Exercise 1: Practice Questions

The average of four consecutive odd numbers $P,Q,R$ and $S$ respectively (in increasing order) is $104$. What is the sum of $P$ and $S$?

In a cricket team, the average age of $11$ players and the coach is$18$ years. If the age of the coach is not considered, then the average decreases by $1$ year. Find out the age of the coach.

If $43x+43y=4816$ what is the average of $x$ and $y$?

The average of marks secured by $35$ students is $72$. If the marks secured by one student was written as $36$ instead of $86$, then find the correct average.

The average weight of $8$ persons are increased by $1.5 \mathrm{kg}$. If a person weighing $65 \mathrm{kg}$ is replaced by a new person, what could be the weight of new person?

In a journey of $160 \mathrm{km}$, a train covers the distance of $120 \mathrm{km}$ at a speed of $80 \mathrm{km}/\mathrm{h}$ and the remaining distance at the speed of $40 \mathrm{km}/\mathrm{h}$. Find the average speed of the train for the whole journey?

The average of $10$ numbers is $7$. If each number multiplied by $12$. Then, find the average of new set of numbers:

The average of five numbers is $49$. The average of the first and the second numbers is $48$ and the average of the fourth and fifth numbers is $28$. What is the third number?