21. Left-Handed People In a sample of 1000 people, 120 are left-handed. Two unrelated people are selected at random without replacement. (a) Find the probability that both people are left-handed. (b) Find the probability that neither person is left-handed. (c) Find the probability that at least one of the two people is left-handed. 22. Light Bulbs Twelve light bulbs are tested to see if they last as long as the manufacturer claims they do. Three light bulbs fail the test. Two light bulbs are selected at random without replacement. (a) Find the probability that both light bulbs failed the test. (b) Find the probability that both light bulbs passed the test. (c) Find the probability that at least one light bulb failed the test.