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From a box containing 2 red 6 white and 5 black... - WAEC Mathematics 1995 Question

From a box containing 2 red, 6 white and 5 black balls, a ball is randomly selected. What is the probability that the selected ball is black?

A
2/13
B
5/13
C
5/11
D
5/6
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Correct Option: B

2r, 6w, 5b balls
Total balls = 2 + 6 + 5 = 13 balls p(black) = 5/13

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