A glass jar contains 6 white, 8 black, 4 red and 3 blue marbles. If a single marble is chosen at random from the jar, what is the probability that it is black or blue?
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Q:
A glass jar contains 6 white, 8 black, 4 red and 3 blue marbles. If a single marble is chosen at random from the jar, what is the probability that it is black or blue?
- 1$${8\over 21}$$false
- 2$${11\over 21}$$true
- 3$${5\over 21}$$false
- 4$${1\over 7}$$false
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