Tony Wheeler was born to travel. His father worked for an airline. For the first 16 years of his life. Wheeler and hisfamily lived in many different countries.
In the early 1970s, Tony met a young woman named Maureen. They soon married. Before getting jobs, Tony andMaureen wanted to travel. They took a year-long trip from England, through Asia, to Australia. On the trip, they visitedplaces like Iran( 伊朗) . India, and so on.
When Tony and Maureen arrived in Australia, people asked many questions about their trip. To answer thesequestions, Wheeler wrote a book called Across Asia on the Cheap. The book told people about different countries' weather,customs( 风俗) ,and places to see. But unlike other travel books then, Tony Wheeler's book also talked about places most tourists did not go. He also wrote about unusual things to see and do. The book was very popular.
Tony and Maureen started a company called lonely Planet. They continued travelling. They wrote books for each placethey visited. Today, 800 people work for Lonely Planet. The company has over 650 books. Tony Wheeler, the greattraveller, still writes about travels to many places and will bring us more surprises.
．有一块边长为30cm的正方形ABCD飞镖游戏板，假设飞镖投在游戏板上的每一点的机会均等．求下列事件发生的概率：
