12) A person who has a heart attack can be saved 90% of the time if a defibrillator is used within 5
minutes of the heart attack. Of the people that
have heart attacks, defibrillators are within the
vicinity 40% of the time; however, they are only
used 60% of the time even when they are in the
surrounding area. How many people who suffer a
heart attack are saved because of the use of a
defibrillator?
O 18%
O 22%
o 40%
0 54%
O
60%