You go to the emergency room on january 1, and your insurance requires a $250 deductible and 20% co-insurance from you. your total emergency room bill is $1,250. how much do you have to pay? a. $200 b. $250 c. $450 d. $550

I would say $450 because of the $1250, $250 is the deductible so has to be paid by you, and then of the $1000 remaining you have to pay 20% so 0.2 x 1000=$200 so the total is $250+$200=$450. Without the insurance you would have had to pay the full $1250 so you saved $800 by having the insurance.