Probability of AP

Probability Level 4

Out of 10001 tickets numbered consecutively, 3 are drawn at random .

Find the chance that the numbers on them are in Arithmetic Progression .

The answer is of the form lk \frac{l}{k} .

Find kl k - l where kk and ll are co-prime integers.

HINT : You might consider solving for 2n+12n + 1 tickets .

You can try more of my Questions here .

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