Answer:
a) 4/19
b) 15/19
c) 0 (0/19)
d) 1 (19/19)
Step-by-step explanation:
In the numerator you put the number of possibilities of your happy outcome. In the denominator you put the total number of possibilities. So the bag contains 4+15=19 marbles, so that will be your denominator in each answer.
