Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °
You are not logged in.
#2 2012-12-20 04:53:23
- bob bundy
- Moderator
Offline
Re: dice probability using Tree Diagram
hi jacks,
You may throw a one straight away, or on throw 2, or on throw 3, or on throw 4, or ...........
See diagram.
P(one at first throw) = 1/6
P(one at second throw) = 5/6 times 1/6 = 5/36
P(one at third throw) = 5/6 x 5/6 x 1/6 = 25/216
etc etc.
As this goes on for ever you need to know how to do the sum to infinity of a geometric progression. Post again if you want help with that.
Bob
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
#3 2012-12-20 05:00:21
- anonimnystefy
- Real Member
Offline
Re: dice probability using Tree Diagram
Hi jacks
The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“A secret's worth depends on the people from whom it must be kept.” ― Carlos Ruiz Zafón