(Answered) Draws are made at random with replacement from a box of

Statistics

Draws are made at random with replacement from a box of colored balls with the following compositions:

Color	Red	Blue	Green	Yellow
Proportion	0.1	0.2	0.3	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:

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