Goran is playing a role-playing game with his friends. He will roll dice to determine if his character casts a spell. Theodds in favorof his character casting a spell are

78

.Find theprobabilityof his character casting a spell.

(b)A child has a box full of colored building blocks. If he chooses one block without looking, the probability of choosing a green block is

35

.What are theodds againstchoosing a green block?