# Average weight of 19 students was 50 kg. If add of a new student reduces it to 49.6 kg, what is the weight of new one?

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The average weight of 19 students was 50 kg. By the admission of a new student the average weight is reduced to 49.6 kg. What is the weight of the new student?

posted Sep 29, 2016

Let the sum of ages of 19 students is x, so their average equation will be : x/19=50
therefore sum of ages of 19 students will be : x=50*19=950

After adding a student, there will be 20 students,
so the equation will be y/20=49.6 (y being the sum of ages of 20 students), so y= 992

Therefore weight of student added is 992-950=42kg

answer Sep 29, 2016 by

1.- 19 students x 50 kgs average = 950 Kgs Total weight
2.- 20 students x 49,6 kgs average= 992 Kgs Total weight
Then , the weight of the new student is 992 - 950 = 42 Kgs

answer Oct 23, 2016 by anonymous

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