(2) The distribution list is

X

2

three

four

P

0.04

0.064

0.896

..... 10 point

?

Test analysis: (1) According to frequency/total number = frequency, you can get ……4 points.

The possible values of (1)X are 2, 3, 4,? ..... 5 points

? ..... 8 points

So the distribution list is

X

2

three

four

P

0.04

0.064

0.896

..... 10 point

? ..... 12 point

Comments: Frequency distribution table and frequency distribution histogram are often tested and should be calculated carefully. The distribution list and mathematical expectation of discrete random variables are necessary questions in the college entrance examination every year, which should be given full attention.