Question
Find the total number of combinations taking at least one green ball and one blue ball, from 5 different green balls, 4 different blue balls and 3 different red balls.
Step 1
Step 1: Count choices by color: green (at least one) = 2^5 − 1 = 31; blue (at least one) = 2^4 − 1 = 15; red (any number) = 2^3 = 8. Show more…
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