Hi, I seem to be having problems calculating this out. My friends were asking me how to caculate multiple precentages and I thought it would be easy but I got a little stuck. Here is the problem. Lets say there is a program that spits out the words yes and no. 60% chance it says yes and 40% chance it says no. If I hit it once, there is a 60% chance it says yes and a 40% chance it says no. If I click it 7 times and it says yes 6 times, what are the odds? I put .6^6 to calculate it, but it seems that I don't include the fact that it says no once. Also, what would the odds be if it said yes all 7 times or no all 7 times? How would you calculate these percentages? Thanks alot, seems like a great forum so far.