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!

- 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 |

- Find the probability that a random person selected has liver disease
- Find the probability that a random person selected has lung cancer or liver disease or heart disease
- 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!

Re: Stat Novice Needs Help With Probability Problem!

Hey NoviceStats.

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

Re: Stat Novice Needs Help With Probability Problem!

@Chiro:

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