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in a three ball lottery. The three balls are selected from a group of 11 balls(1-11) what is the probability that all drawn numbers are even if

a. Each ball drawn is replaced

b. Each ball drawn is not replaced

 Feb 15, 2020
 #1
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 balls

 

a - There are 5 EVEN numbers. The probability =5/11 x 5/11 x 5/11=125 / 1331

b- Probability =5/11 x 4/10 x 3/9 =60 / 990 =2 / 33

 
 Feb 15, 2020

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