Permutation and CombinationHard
Question
If n identical dice are rolled, then no. of possible out comes are -
Options
A.6n
B.
C.(n + 5)C5
D.None of these
Solution
Let i appears on ai dice i = 1, 2, 3, 4, 5, 6
so no. of out comes is equal to no. of solution of a1 + a2 + a3 + a4 + a5 + a6 = n = (n + 5)C5
so no. of out comes is equal to no. of solution of a1 + a2 + a3 + a4 + a5 + a6 = n = (n + 5)C5
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