A stable population of 42000 lives on three islands. Although there is migration between the islands each year, the population on each island is constant. Every year 20% of the birds on A migrate to B, 10% of the birds on B migrate to C and 40% of the birds on C migrate to A.
Write down three equations and find the number of birds on each island.
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this is very tough as I am 7th so sorry don't report me please
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