According to the allknowing Wikipedia about 10 of all humans

According to the all-knowing Wikipedia, about 10% of all humans are left-handed. What would you say is the probability that the next person you run into is left-handed? What\'s the probability that he or she is right-handed? In an average year, about 650 different pitchers pitch to at least one batter in a major-league baseball game. Based on your answer to Question 1, how many would you expect to be left-handed? In reality, on average 175 of those pitchers are left-handed. What do you think that statistic says about being left-handed as a baseball pitcher? Explain.

Solution

(a)

Since 10% of people are left handed

therefore 10 out of 100 people are left handed

thus probability of left hand people next to you = 10/100 = 1/10

similerly probalibity of people who are right handed would be = 1-1/0 = 9/10

(b) Given that

there are 650 different pitchers so therefore no. of left hand pitchers would be

= 1/10 *( 650)

= 65

(c) There are 175 pitchers who are left handed that means left-handed people are more likely to involve in such game as per comparision to right handed people. Because poplulation of right handed people are more than left handed people but probability of finding pitchers of left handed people is more as comparision to right handed people.