Maths question

Oral Written Total
Good Poor
Good 17 21 38
Poor 12 30 42
Total 29 51 ...

80

This is a contingency table under probability

Would be glad if anyone can show me the formula to solve the quests below.

1. Good oral or written communication skills
2. Good written communication skill given that the application has good oral communication skill

Thank you

I dont think anyone can understand or help you with your howework here
youll need to ask someone whos doing the same test in the same school as you are
because theyll know what your talking about