1, a student * * * answered ten questions and finally got 72 points. He answered several questions correctly.
10-( 10× 10-72)÷( 10+4)
= 10-28÷ 14
= 10-2
=8 questions
2. Student B * * answered twelve questions and finally got 22 points. He answered several questions wrong.
( 10× 12-22)÷( 10+4)
=98÷ 14
=7 questions