Math Is Fun Forum
  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

bobbym
2012-11-25 14:38:04

Hi;

It is based on a tree and trick for summing series like that. What part do you need help on?

jacks
2012-11-25 14:19:41

Thanks bobbym

would you like to explain it to me

bobbym
2012-11-22 21:02:01

Hi jacks;

I am getting













So the probability is 5 / 11.

This agrees with computer simulations.

jacks
2012-11-22 13:35:51

A six faced fair dice is thrown until 1 comes, then the probability that 1 comes in even no. of trials is

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