Question

Asked Oct 13, 2019

how to do question 5 ?

Step 1

To count the number of required selections

Step 2

a) There are 4 colors, first choose the color in 4 ways, 4 balls can be chosen from 5 in 5 C4 = 5C1 = 5 ways. So the total number of selections is 4 x 5 =20

Step 3

b) Number of colors is 3, so the number of selections of color = 4C3=4. Two of the same color are selected in 10 ways, The ...

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