A container contains 12 red rocks 18 blue rocks and 25 white

A container contains 12 red rocks, 18 blue rocks, and 25 white rocks.    What is the probability of selecting one red rock out of the container?    Write your answer as a fraction (reduced) like \"5/16\". What is the probability of selecting one blue rock out of the container?    What is the probability of selecting one white rock out of the container?

Solution

total number of rocks in container= 12 red rocks+18 blue rocks + 25 white rocks= 55

probability of selecting one red rock out of the container= (total number of red rocks)/(total rocks in container)=12/55

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probability of selecting one Blue rock out of the container= (total number of Blue rocks)/(total rocks in container)=18/55

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probability of selecting one white rock out of the container= (total number of white rocks)/(total rocks in container)=25/55=5/11