Average Practice Test 3

Question : 37 of 40

Marks: +1, -0

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?

$53 2 /3$ kg
$52 2/ 3$ kg
$53 1 /2$ kg
$52 1 /2$ kg

Validate

Solution:

New average weight

={45×52-5×48+5×54}/45

={2340-240+270}/45

=158/3\kgs

=52 2/ 3

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