Question

1. For question 22, use the following table:

	Alzheimer’s Disease	No Alzheimer’s Disease	Total
With new drug	10	90	100
With Placebo	60	40	100

Find P(Alzheimer’s disease|New drug).

#2 .  

Use the following information on blood groups for 100 patients to answer questions 24, 25 and 26:                       (Note: Blood types are mutually exclusive.)

               Blood type à                O            A            B            AB

               Total                                  40          30          20          10

1. If one person is randomly selected, find the probability of getting someone with type “O” blood.

2. If one person is randomly selected, find the probability of getting someone who is type “A” or type “B”.

3. What is the probability of being type “O” and type “A”?

Answer 1