Fortune Telling Collection - Free divination - Take out two spades 6 and two spades 10 from two identical playing cards. Now put these two or four playing cards on the table with their backs facing up and wash them evenly.
Take out two spades 6 and two spades 10 from two identical playing cards. Now put these two or four playing cards on the table with their backs facing up and wash them evenly.
(1) The probability of randomly drawing a playing card as spades is 6 = 24 = 12;
(2) Let two spades 6 be A and B respectively, and two spades 10 be M and N respectively. Draw a tree diagram as follows:
* * * 12 cases, with pairs of ba, ab, mn and nm.
Then the probability that two randomly selected playing cards can become a pair is: 4 12 = 13.
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