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02 May 2005, 07:12
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A box has 10 balls. Find how many ways 6 balls can be selected if each ball may be repeated any number of times.
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02 May 2005, 11:48
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General formula for selection with repetitions.
The number of ways to pick k items out of n with repetitions = kC(n+k-1)
In this case
6C(10+6-1) = 6C15
The number of ways to pick k items out of n with repetitions = kC(n+k-1)
In this case
6C(10+6-1) = 6C15
02 May 2005, 12:06
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is there a simpler way of doing this? not able to understand the formula..
