Three-persons-A-B-C-are-to-speak-at-a-function-along-with-five-others-If-they-all-speak-in-random-order-the-probqbility-that-A-speaks-before-B-and-B-speaks-before-C-is-

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Question Number 99136 by babar last updated on 18/Jun/20

$$\mathrm{Three}\mathrm{persons}A,B,C\mathrm{are}\mathrm{to}\mathrm{speak}\mathrm{at}\mathrm{a}$$$$\mathrm{function}\mathrm{along}\mathrm{with}\mathrm{five}\mathrm{others}.\mathrm{If}\mathrm{they}$$$$\mathrm{all}\mathrm{speak}\mathrm{in}\mathrm{random}\mathrm{order},\mathrm{the}\mathrm{probqbility}$$$$\mathrm{that}A\mathrm{speaks}\mathrm{before}B\mathrm{and}B\mathrm{speaks}$$$$\mathrm{before}C\mathrm{is}$$

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