2math questions plus bonus question hurry i need ! an examination consists of three parts. in part a, a student must answer 2 of 3 questions. in part b, a student must answer 6 of 8 questions and in part c, a student must answer all questions. how many choices of questions does the student have?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.