Answered

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Amy raised £n for charity.
Chris raised £18 more then any.
The mean amount raised by the two of them is £45.
Work out how much money each one of them raised.

Sagot :

AL2006
Amy = n
Chris = n + 18

Mean = 1/2 (Amy + Chris)

45 = 1/2 (n + n + 18)
45 = 1/2 (2n + 18)
45 = n + 9

36 = n

Amy = 36
Chris = 54
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