Fortune Telling Collection - Free divination - There are three playing cards, namely five Zhang Meihua, seven hearts and two spades. If two cards are randomly drawn from three cards, the possibility that their difference is 2 is () A. 13B.
There are three playing cards, namely five Zhang Meihua, seven hearts and two spades. If two cards are randomly drawn from three cards, the possibility that their difference is 2 is () A. 13B.
There are three situations: (5, 7), (5, 2), (7, 2);
The difference in the first case is 7-5 = 2; The difference in the second case is 5-2 = 3; The difference in the third case is 7-2 = 5;
So the probability is:1÷ 3 =13;
So the answer is: a.
- Related articles
- What constellation is June 13?
- Three emperors and five emperors refer to
- Why does alchemy divide gold with copper plates coated with mercury?
- Who is the slang lawyer rat?
- Spiritual turtle with self-cultivation method
- What are the attributes of the gray five elements?
- What is the meaning of the algorithm system characterized by constructiveness and mechanization in ancient mathematics in China?
- The mystery of Qin Shihuang's death died unexpectedly in a palace coup.
- Can the tortoise really live for ten thousand years?
- The contradiction between opposing killing and liking fur.