'Suppose there are large piles of red, blue, green; and white balls_ a) How many ways are there to select balls? b) What if at least one red ball must be chosen?'
Added by Daniel F.
Step 1
We can use the formula for the number of combinations with repetition: n^r, where n is the number of colors (4) and r is the number of balls we want to select. So, the total number of ways to select balls is: 4^1 + 4^2 + 4^3 + 4^4 = 4 + 16 + 64 + 256 = 340 b) Show more…
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