SOLUTION: suppose that two balls are selected at random succession without replacement from a box containing five red and three blue balls .If X is the random variable for the number of red

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Question 1190806: suppose that two balls are selected at random succession without replacement from a box containing five red and three blue balls .If X is the random variable for the number of red balls,find cumulative distribution function of X
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
0 red balls is 5C0*3C2/8C2=3/28
1 red ball is 5C1*3C1/8C2=15/28
2 red balls is 5C2*3C0/8C2=10/28
CDF is 3/28 for 0; 18/28 for 0,1, 1 for 0,1,2.