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

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