SOLUTION: a man sold 100 eggs.Eighty of them were sold at a profit of 30 percent while the rest were sold at loss of 40 percent.What is the percentage gain or loss on the whole stock?

Question 622212: a man sold 100 eggs.Eighty of them were sold at a profit of 30 percent while the rest were sold at loss of 40 percent.What is the percentage gain or loss on the whole stock?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I can pick any price at which the man
bought the eggs. I will say he paid $1
each for them, or $100 for 100 eggs.
------------
So, he paid $80 for 80 eggs. If he sold
them at 30% profit,
He sold them for dollars
------------
He bought the remainder, 20 eggs for
$20. If he lost 40%, he lost
So, he sold them for dollars
------------
So, he received dollars

His percentage gain was = 16%

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