Latest IBM Aptitude Question SOLUTION: When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?

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When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?

Asked In IBM (13 years ago)

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Tijo Jose  (13 years ago)

57 kg

Let the avg wt of 59 students be x

(59x + 45) / 60 = (x - 0.2)
That is,
(59x + 45) = 60x - 12
x = 57

Is this solution Helpfull? Yes (51) | No (7)  

stuti  (10 years ago)

let avg age of 60 students be=x
so now acc 2 ques=(60x-45)/59=x+.2
on solving v get x=56.8
so present avg=56.8+.2=57(ans)

Is this solution Helpfull? Yes (11) | No (1)  

himaja reddy  (11 years ago)

total students=60
1 student left
his weight=45kg
avg weight of remaining 59 students=?
avg weight of 60 students =total/60=x
total=60*x
now avg weight of 59 stud=total-45/59
(total-45)/59=x+0.2(increased by 20grams,given)
total-45=59(x+0.2)
total-45=59x+11.8
60x-45=59x+11.8(total=60x)
x=45+11.8
x=56.8
total weight of 60 students=60(56.8)=3408
total weight of 59 students=3408-45
=3363
avg weight of 59 students=3363/59=57
answer is 57

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stuti  (10 years ago)

it wuld b decreased by 200g not increased

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