The company will have a good development in the future.

(3) What was the annual output last year? Tens of thousands of units were sold last year. ..... (more than one answer)

2.( 1) I know that the number of class 6 (2) with type A blood is 28%, type B blood is 24%, type O blood is 40%, and type AB blood is 8%.

⑵ Type A: 50× 28% = 14 (human) Type B: 50× 24% = 12 (human) Type O: 50× 40% = 20 (human) Type AB: 50× 8% = 4 (human) Answer: ...

3.( 1) is unreasonable, because there are many shoes left in sizes 35, 37 and 39.

(2) It is suggested to buy less shoes in sizes 35, 37 and 39 when buying next time.

(3) Using modal knowledge.

4.( 1) Average: (9.8+9.7× 2+9.6× 4+9.5+9.4× 2+9.1) ÷1≈ 9.55 Median: 9.6.

(2) (9.7× 2+9.6× 4+9.5+9.4× 2) ÷ 9 ≈ 9.57 (point) makes sense, because the average is related to every data in a set of data, but it is easily influenced by extreme data, so in order to reduce this influence, we take to remove a highest score and a lowest score, and then calculate the average.

5. The first one in the first row is connected with the first and second ones in the second row; The second is in the first row and the third is in the second row; Fourth in the first row, fourth in the second row; Fifth in the first row, fifth in the second row.

6. Team B is very likely to win, because the first three games are neck and neck, but team B won the most in the last two games, which shows that team B has been in better shape than team A recently.

7. Divide the circle into 8 parts on average, with singing accounting for 5 parts, dancing accounting for 1 part and reading accounting for 2 parts.