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For the experiment described below, let x determine a random variable, and use your knowledge of probability to prepare a probability distribution.

Three balls are drawn (with replacement) from a bag that contains

3

white

balls and

4

green

balls. The number of

green

balls is counted.

 Apr 19, 2019
 #1
avatar+106539 
0

0  green balls  = (3/7)^3  ≈ .079

1 green ball  =  C(3,1) (4/7)*(3/7)^2  = .315

2 green balls = C(3,2) (4/7)^2*(3/7)  = .42

3 green balls  =  (4/7)^3  = .187

 

cool cool cool

 Apr 19, 2019
edited by CPhill  Apr 19, 2019

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