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From a box containing 2 red, 6 white and 5 black balls, a ball is...

Mathematics
WAEC 1995
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
  • E. 11/13
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Correct Answer: Option B
Explanation
2r, 6w, 5b balls
Total balls = 2 + 6 + 5 = 13 balls p(black) = 5/13
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