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gxcc1
Gxcc1

primary 5 chevron_right Maths chevron_right Whole Numbers chevron_right Singapore

This is average. Can you please help me?

Date Posted: 4 years ago
Views: 268

See 1 Answer

Average before new (2 class) join= 33
Average after new class join = 32
Different pupils in average = 33-31=1
2 new class with 20 each, total = 40
Decrease in average with this 2 class
= (2 x32) - 40
= 64 - 40
= 24 pupils
Therefore, before 2 new class join in, number of class = 24/1= 24 class
Member of pupils = 24 x 33 = 792 pupils.

Hope this helps
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AC Lim
Ac Lim's answer
12085 answers (A Helpful Person)
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AC Lim
AC Lim
4 years ago
Typo
1. Different pupils in average = 33-32=1
2. Decrease in average *without* this 2 new class....
gxcc1
Gxcc1
4 years ago
Thanks!