The notation means that the probability for x being a given number is kx if x is 1, 2, 3, 4 or 5, or 0 if x is something else.
E.g. the chance of x being 2 is 2k, and the chance of x being 7 is 0.
All probabilities add up to 1, so k + 2k + 3k + 4k + 5k = 1.
k can then be calculated with simple algebra.
E.g. the chance of x being 2 is 2k, and the chance of x being 7 is 0.
All probabilities add up to 1, so k + 2k + 3k + 4k + 5k = 1.
k can then be calculated with simple algebra.
(edited 1 year ago)
Original post by George H.
The notation means that the probability for x being a given number is kx if x is 1, 2, 3, 4 or 5, or 0 if x is something else.
E.g. the chance of x being 2 is 2k, and the chance of x being 7 is 0.
All probabilities add up to 1, so k + 2k + 3k + 4k + 5k = 1.
k can then be calculated with simple algebra.
E.g. the chance of x being 2 is 2k, and the chance of x being 7 is 0.
All probabilities add up to 1, so k + 2k + 3k + 4k + 5k = 1.
k can then be calculated with simple algebra.
I would personally have stopped at that point and left the OP to work out the explicit sum, but at least you stopped short of giving the final answer
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