Dr. Lal and Jain Solutions for Exercise 1: Exercise 14

The average age of three persons is $45$ years, their ages are in the ratio of $2:3:4.$ The difference between the ages of the youngest and the eldest is-

The average of the runs scored by a cricket eleven is $50$. If the runs scored by the captain is excluded, the average score rises by $5$. How many runs did the captain score?

The average of three numbers is $77.$ The first number is double of the second, the second is double of the third. The numbers are -

The average of two numbers is $180.$ If one of them is half the other, the numbers are -

The average of three numbers of which greatest is $16$, is$12$. If the smallest is half of the greatest, the remaining number is -

The average of$11$ numbers is $21$. If$3$is added to each given number, what will be the new average?

The average of $11$ results is $30$, that of the first five is $25$, and that of the last five is $28$. Find the value of the sixth number.

A person covers$12 km$ at $3 km/hr,$ $18 km$ at $9 km/hr$, and $24 km$ at $4 km/hr.$ Then find the average speed in covering the whole distance.