A bag contains $7$ red marbles, $13$ black marbles, and $10$ white marbles. If any one marble is picked without looking, what is the probability that the marble will be either red or white?

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Solution

7 red ,13 black,10 white
Probability that random picked one marble=7/30+10/30=17/30

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A bag contains 7 red marbles, 13 black marbles, and 10 white marbles. If any one marble is picked without looking, what is the probability that the marble will be either red or white?

7 red ,13 black,10 whiteProbability that random picked one marble=7/30+10/30=17/30

A bag contains $7$ red marbles, $13$ black marbles, and $10$ white marbles. If any one marble is picked without looking, what is the probability that the marble will be either red or white?

7 red ,13 black,10 white
Probability that random picked one marble=7/30+10/30=17/30