(C) Initial average weight of $45$ students $= 52 \, kg.$Total weight of $45$ students $= 45 \times 52 = 2340 \, kg.$Weight of $5$ students who left $

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(C) Initial average weight of $45$ students $= 52 \, kg.$Total weight of $45$ students $= 45 \times 52 = 2340 \, kg.$Weight of $5$ students who left $= 5 \times 48 = 240 \, kg.$Weight of $5$ students who joined $= 5 \times 54 = 270 \, kg.$New total weight $= 2340 - 240 + 270 = 2370 \, kg.$Since the number of students remains $45$,the new average weight $= \frac{2370}{45} = \frac{474}{9} = \frac{158}{3} = 52 \frac{2}{3} \, kg.$

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The average weight of $45$ students in a class is $52 \, kg.$ Five of them whose average weight is $48 \, kg$ leave the class and other $5$ students whose average weight is $54 \, kg$ join the class. What is the new average weight (in $kg$) of the class?

A
$52 \frac{1}{3}$
B
$52 \frac{1}{2}$
C
$52 \frac{2}{3}$
D
$52 \frac{3}{2}$

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The average weight of $45$ students in a class is $52 \, kg.$ Five of them whose average weight is $48 \, kg$ leave the class and other $5$ students whose average weight is $54 \, kg$ join the class. What is the new average weight (in $kg$) of the class?

Similar Questions

Fifteen movie theatres average $600$ customers per theatre per day. If $six$ of the theatres close down but the total theatre attendance stays the same,then the average daily attendance per theatre among the remaining theatres is:

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Refer to the line graph and answer the given question.
Number of candidates who qualified in a given competitive examination from $6$ states during two given years.
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