Math/Probability

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For example, you have to pick a donut from a box randomly that has the following six donuts:
glazed, plain, sprinkles, double chocolate, chocolate frosted, and jelly.

What is the complementary event of getting a plain donut?

• Math/Probability -

Well, first of all, I forgot what a complementary event was. And would my answer be a fraction?

• Math/Probability -

Anyone?...

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