Posted by Rmz on Saturday, January 9, 2010 at 7:10pm.
A parent's chance of passing a rare inherited disease on to a child is 0.15. What is the probability that, in a family of three children, none of the children inherits the disease from the parent?
How does that work?

Science  drwls, Saturday, January 9, 2010 at 10:55pm
The chance of a child NOT having the inhertited disease is 0.85. For none of the three children to get it, the probability is 0.85^3 = 0.614