Statistics indicate that 4% of mal
es and 0.3% of females are color-blind.
a population is half female.
What is the probability that a randomly selected person is
female, given that the person is color-blind?
A box contains six red marbles
and five green marbles.
Five marbles are selected simulta-
neously and at random.
What is the probability that at least one is red?
Sherlock Holmes is being held captive on an estate and must send a message of his loca-
tion to Dr. Watson.
The probability of success by attaching a note to the collar of his
bloodhound is 0.4, and by carrier pigeon is 0.5.
If the success or failure of each method
is independent of the other, find the probabili
ty the message will arrive if he sends it by