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(i) Twelve balls are distributed at rand...

(i) Twelve balls are distributed at random among three boxes what is the probability that the first box will contain 3 balls ?
(ii) If 'n' different biscuits are distributed amoong N beggers, find the chance that a particular begger receives exactly `r ( lt n)` biscuits.

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The correct Answer is:
`(i) (.^(12)C_(3)xx2^(9))/(3^(12))`
`(ii) (.^(n)C_(r )(N-1)^(n-r))/(N^(n))`
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