3.90 beads are evenly placed on a circle. Each of them is, independently of the other ones, coloured white, grey or blac

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3.90 beads are evenly placed on a circle. Each of them is, independently of the other ones, coloured white, grey or blac

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3 90 Beads Are Evenly Placed On A Circle Each Of Them Is Independently Of The Other Ones Coloured White Grey Or Blac 1
3 90 Beads Are Evenly Placed On A Circle Each Of Them Is Independently Of The Other Ones Coloured White Grey Or Blac 1 (18.99 KiB) Viewed 60 times
3.90 beads are evenly placed on a circle. Each of them is, independently of the other ones, coloured white, grey or black with the respective probabilities 1/2, 1/3, 1/6. A triple of adjacent beads is called representative if all of them have different colours. Find the expectation of the number of representative triples.
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