36)

pick 4 out of 56 and 1 out of 46.

70%) coins in the box. You pick a coin from the box, toss it 5

times and get 4 heads. What is the probability unfair?

fair.

rare disease. He decides to get tested, and suppose that the

testing methods for this disease are accurate 99 percent of

the time (regardless of whether the results come back

positive or negative). Suppose this disease is actually quite

rare, occurring randomly in the general population in only one

of every 10,000 people.

If his test results come back positive, what are his chances of

actually having the disease?

(a) .99,

(b) .90,

(c) .10, or

(d) .01?