Reuben Ngiau Jia Wen's answer to Wee Teck's Junior College 2 H2 Maths Singapore question.
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As for part ii, the probability would be 0%. If 2 friends were to receive the correct letters, the third friend would receive his as well. Therefore it is impossible for only exactly 2 friends to receive the correct letters
Date Posted:
4 years ago
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