Question: Draws are made at random with replacement from a box of colored balls with the following compositions:
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Color
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Red
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Blue
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Green
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Yellow
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Proportion
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0.1
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0.2
|
0.3
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0.4
|
Write down and justify unsimplified expressions for the probabilities of the following events:
a) Exactly 5 yellow balls appear in 20 draws:
b) Exactly 2 red, 4 blue, 6 green and 8 yellow balls appear in 20 draws:
c) The number of draws required to produce 3 red balls is 25: