The question below deals with the ratio concept of internal transfer.
Such questions usually appear in Paper 2.
Calculator usage is allowed.
Oliver and Chris have some erasers.
At first, the number of erasers that Oliver have to
the number of erasers that Chris have was 2:3.
After Oliver gave Chris 45 erasers,
the ratio of Oliver's erasers to Chris' erasers became 1:9.
How many erasers did Chris have at first?
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