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Maths Puzzle
Logical Reasoning
Seating Arrangement
The mean weight if 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg)
Read Solution (Total 4)
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- let d total no of students be x
x/34=42 => x=1428
nw the teacher s included
ie.,(1428+y)/35=42+0.4(convert 400gms into kg ie.,400/1000=0.4)
=>y=56 - 12 years agoHelpfull: Yes(3) No(0)
- total weight of all students=34*42=1428
after inclusion of teacher =35*42.4=1484
difference bw them=56=weight of teacher..
- 12 years agoHelpfull: Yes(3) No(0)
- ((42*34)+x)/35=42+0.400
if we solve this then x=56
weight of teacher is=56 - 12 years agoHelpfull: Yes(2) No(0)
- avg of 34 s = 42 hence total weight = 1428
avg 35(34+teacher)=42.4 hence total weight=1484
differnce of two=56 (age of teacher) - 12 years agoHelpfull: Yes(1) No(0)
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