Suppose these three students draw lots in the following order: A first, B second and C third.
Tree diagram:
Then all possible outcomes are: ABC, ACB, BAIC, BCA, CAB, CBA * *.
There are two lottery winning results in A, P (lottery winning in A) =13;
There are two results in winning the lottery in B, P (winning the lottery in B) =13;
There are two winning results in the third lottery, P (winning the third lottery) = 13.
So the probability of winning the lottery is the same between the person who draws first and the person who draws later ... (8 points)