10 dollars 25 % can be converted to a fraction of .25 (do this by dividing 25% by 100 so 25/100=.25) Then do .25 x 8 which will get you 2 dollars. So the 2 dollars is 25% of the sale. Then do 2+8 =10 So when you sell it you will make a 25% profit (the 2 dollars)
Answer: Approximately normal, because we expect 19.2 successes and 20.8 failures from people in their twenties, and 16.8 and 43.2 from people in their fifties, and all of these counts are at least 10.
