Test analysis: (1) First of all, we set the first prize, the second prize and the third prize as events A, B and C, and get the ball back four times, which is equivalent to four independent repetitions. The probability of the words "horse", "business" and "money" appearing in each test is zero. According to the first prize and the third prize,
(2) If the number of touches is, all possible values of are 1, 2, 3, 4.
In four independent repeated experiments, the probability of "money" happening every time is that the probability of not happening is that according to the meaning of the question, the distribution table and mathematical expectation can be obtained.
Solution: (1) Let the first prize, the second prize and the third prize be events A, B and C respectively.
Then (if the formula is correct and the calculation is wrong, deduct 1 minute) 2 points.
(If the formula is correct and the calculation is wrong, deduct 1 minute)? 4 points
The third prizes include: Ma, Ma, Shang, You, Ma, Shang, You and Ma, Shang and You.
? 6 points
(2) If the number of touches is, all possible values of are 1, 2, 3, 4.
? 10 point
Therefore, the distribution table of the number of times to take the ball is:
1
2
three
four
P
?
? 12 point