The average age of a group of persons going f | vedclass

Name: PDF Generator App | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

Let the person initially going for picnic is $x$

$16.75 	imes x+20 	imes 13.25=15(x+20)$

$1.75 x=15 	imes 20-20 	imes 13.25$

$1.75 x=35 \

Vedclass · Accepted Answer

$20$

Vedclass · Answer

Let the person initially going for picnic is $x$

$16.75 	imes x+20 	imes 13.25=15(x+20)$

$1.75 x=15 	imes 20-20 	imes 13.25$

$1.75 x=35 \Rightarrow x=20$

The average age of a group of persons going for a picnic is $16.75 \,years.$ $20$ new persons with an average age of $13.25 \,years$ join the group on the spot due to which the average of the group becomes $15\, years.$ Find the number of persons initially going for the picnic $?$

Similar Questions

A man travels by a car to his office at $60 \,km / h$ and returns home along the same route at $20 \,km / h .$ Find the average speed of his whole journey. (in $km/h$)

The average of $6$ observations is $12 .$ A new seventh observation is included and the new average is decreased by $1$. The seventh observation is

The average marks of a class of $35$ children is $35 .$ The marks of one of the students, who got $35,$ was incorrectly entered as $65 .$ What is the correct average of the class?

The average of first nine prime numbers is

The average weight of $15$ oarsmen in a boat is increased by $1.6\, kg$ when one of the crew, who weighs $42\, kg$ is replaced by a new man. Find the weight of the new man (in $kg$)