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# The average weight of a class of 44 students is 36kgs. If

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Director
Joined: 16 Jun 2004
Posts: 891

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The average weight of a class of 44 students is 36kgs. If [#permalink]

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09 Sep 2004, 01:43
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The average weight of a class of 44 students is 36kgs. If the weight of the teacher is included, then the average weight of the class increases by 1kg. What is the weight of the teacher?

A. 37kgs
B. 81kgs
C. 73kgs
D. 63kgs
E. 45kgs

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GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5036

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Location: Singapore

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09 Sep 2004, 01:44
Total weight of 44 students = 1584kg

If the ave weight increases by 1kg, it becomes 37kg
Total weight of 44 students and 1 teacher = 37*45 = 1665

So weight of teacher = 81kg

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Manager
Joined: 02 Apr 2004
Posts: 222

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Location: Utrecht

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09 Sep 2004, 02:02
Yes, I have B as answer too.

44*36 + 1*x / 45 = 37
1584 + x / 45 = 37

45*37 = 1665

1665 - 1584 = 81 kilograms.

Regards,

Alex

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Manager
Joined: 28 Jul 2004
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09 Sep 2004, 03:55
its 81
way 2 easy guys
_________________

Jim

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09 Sep 2004, 03:55
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