A world map has a scale of 1/4 of an inch equals 250 miles. You measure the distance between New York, NY and Los Angeles, California and it equals 3 inches.What is the real distance between New York and LA?
Answer(s): D
Of 1,000 dogs, 72% are male. Among the males, 3 out of 5 were over the age 5.How many of the dogs were males over the age of 5?
Answer(s): B
First multiply 1000 × 0.72 to find out how many dogs are male. This results in 720 male dogs of which 3/5 are over the age of 5. Therefore, multiply 720 × 3/5 (or 0.6) which results in 432.
There are 78 female and 54 male patrons at a local diner.What percentage of the diner's patrons are female?
Add 78 to 54 to get 132 total patrons, then divide the number of females into the total number of patrons.Therefore, 78/132 = 0.5909 = 59%.
A new cancer treatment provides a 50% success rate for patients with lung tumors. Lung tumors make up 10% of all cancer patients.What percentage of all cancer patients will this new drug work on?
Answer(s): A
A simple way to solve this is to multiply the two percentages. Therefore, multiply 0.50 × 0.10 and you get 0.05 or 5%.
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?
If a defibrillator is used, we know that the patient will have a 90% success rate; however, only 40% of the people have this option available.Therefore, we take 0.9 × 0.4 and know that only 36% of the people have this opportunity.However, we also know that of the 36% of suffers, only 60% of the time is a defibrillator used.Therefore, we must take 0.6 × 0.36 to find out how many patients are saved by the use of a defibrillator.This results in 0.216 or 22% of patients are saved by the use of a defibrillator.
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A and D are True
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