(1) According to "80% of the students answered the second question correctly" and 10 people answered the second question incorrectly, you can calculate the * * * statistical total.

10 ÷ (1-80%) =10 ÷ 0.2 = 50 people

(2)( 12*8-9- 10-6-6- 18-23)÷( 1+2)=8,8×2= 16

50-8=42,50- 16=34

There are 42 people in the fifth question and 34 people in the sixth question.