text: to decide who gets the last peice of pie, a family of five picks numbers from 1-10. what is the probabiltiy? that at least 2 of them will pick the same number?  final answer is 0.70! p(at least two pick the same number) = 1 - p(none pick the same number) = 1 - (10/10)(9/10)(8/10)(7/10)(6/10 (since each time, there is one less number for the family members to pick that is different from the others) = 1 - 0.3024 = 0.6976