Liu Rijing's answer to Shashasre's Junior College 1 H2 Maths question.

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Liu Rijing
Liu Rijing's answer
49 answers (A Helpful Person)
B) probability all winners coming from Y = (50*49*48*47)/(430*429*428*427)
Liu Rijing
Liu Rijing
6 years ago
Sorry it should be (80*79*78*77)/(430*429*428*427)