A Bag contains 42 red, 45 green, 20 yellow, and 32 purple candies. you pick one candy at random. find the probability that it is yellow or not green Simply
P(yellow or not green)

What the heck don’t understand

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.