Determine exact odds that both are dogs


1. Laura has 15 dolls in the collection. Five of the dolls have hats. If Laura chooses 2 dolls at random, find exact probability that at least one of them will have the hat?

2. Of the 25 animals at animal shelter, 15 are dogs. Two animals are selected at random. Determine exact odds that both are dogs?

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Mathematics: Determine exact odds that both are dogs
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