Thread: Stat Novice Needs Help With Probability Problem!

Hi Everyone!

I'm so happy to have found this forum. I am the absolute worst at math, and I'm almost positive I'm doing this problem wrong. I would be extremely helpful for any help!

1. The following table shows the number of patients with different types of disorders / disease associated with patients at General Hospital within the last year. Assume each patient has only one disorder

Types of Disorders / Disease	Number of Patients with Disorder / Disease
Liver Disease	346
Lung Cancer	147
Heart Disease	232
Diabetes	187
Alzheimer’s	93

1. Find the probability that a random person selected has liver disease
2. Find the probability that a random person selected has lung cancer or liver disease or heart disease
3. Find the probability that a random person selected has liver disease and lung cancer

d. What type of probability calculation approach is being exercised in this example (classical, relative frequency or subjective)?

My answers:
a. 346/1005 = .34
b. (147+346+232)/1005 = .72
c. Not really sure what my professor is asking here. The question says to assume each person has only one disorder.
d. Classical

Thanks again for your time everybody!

Hey NoviceStats.

Hint: If one person can only have one disease then the probability of having two should be 0.

@Chiro:

Haha I assumed that, but I did not know if maybe it was a trick question or something. Thank you!