Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
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You are not logged in. #1 2012-12-20 04:21:46
machine probabilityThere are 4 machine and it is known that exactly 2 of them are faulty.they are tested one by one in a random order |