In a class of 50 students, there are 18 girls and 32 boys. Of these students, 20 are vegetarians and rest non vegetarians amf twelve of the vegetarians are boys. If a student is chosen at random, what is the probability of
A) Choosing a girl?
B) Choosing a non vegetarian student?
c) Choosing a boy student who is non vegetarian?
D) Choosing a girl who is vegetarian?