SOLUTION: Sum of ages of pupils is x.10 years later x+400.find number of pupils.
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Question 1013857
:
Sum of ages of pupils is x.10 years later x+400.find number of pupils.
Answer by
ikleyn(52788)
(
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):
You can
put this solution on YOUR website!
.
Each contributes 10 to 400.
The number is
= 40.
