A bag contains four coins of each 1 rupee, 2 rupees and 5 rupees. Assuming coins of same denomination to be identical. The number of ways of donating some amount to a begger is
12
11
64
124
As we have learned
Theorem of Combinations -
The number of ways of selecting at least one item from a collection of m objects of one kind, n objects of another kind and p other kind is (m + 1) (n + 1) (p + 1) -1.
In this question,
Number of ways = (4+1)(4+1)(4+1) -1 = 124
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