RPH Editorial Board Solutions for Chapter: Average, Exercise 1: MULTIPLE CHOICE QUESTIONS

The average height of $30$ boys, out of a class of $50$, is $160$ cm. if the average height of the remaining boys is $165$ cm, the average height of the whole class (in cm) is:

The average age of an adult class is $40$ years. $12$ new students with an average of $32$ years join the class, thereby decreasing the average of the class by $4$ years. The original strength of the class was:

If $a, b, c, d, e$ are five consecutive odd numbers, their average is:

Of the three numbers, second is twice the first and is also thrice the third. If the average of three numbers is $44$, the largest number is:

The average of $50$ numbers is $38$. If two numbers namely, $45$ and $55$ are discarded, the average of remaining number is:

The average height of $30$ girls out of a class of $40$ is $160$ cm and that of remaining girls is $156$ cm. The average height of whole class is:

The average of n numbers is $x$. If $36$ is subtracted from any two numbers each, then new average is $(x-8)$. The value of $n$ is:

The average salary of male employee in a firm is $520$ and that of female employees is $420$. The mean salary of all the employees is $500$. The percentage of female employees is: