SassuWunnu: We have 19 smarties in a bag left. 6 spills on the floor. What are the chances of 4 out of that 6 being blue, if there were 2 red 6 blue 5 brown 3 yellow and 3 green in the bag?
We have 19 smarties in a bag left. 6 spills on the floor. What are the chances of 4 out of that 6 being blue, if there were 2 red 6 blue 5 brown 3 yellow and 3 green in the bag?
CPhill: 154 * Σ 3(n -1) * (-1)(n-1) n = 4I can't get this to display correctly...The "15" is supposed to be directly over the summa sign and the "n = 4" is supposed to be directly under it....I think you get the idea......
154 * Σ 3(n -1) * (-1)(n-1) n = 4I can't get this to display correctly...The "15" is supposed to be directly over the summa sign and the "n = 4" is supposed to be directly under it....I think you get the idea......
reinout-g: mariahmorgan143: -2-5 -2-5 = -7 http://www.mathsisfun.com/positive-negative-integers.html
mariahmorgan143: -2-5
-2-5
mathgirl303: (1/2)^-2
(1/2)^-2
+118730 
