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

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Topic review (newest first)

bob bundy
2012-12-20 05:16:03

hi

I have made the complete tree but left out some probabilities so you can practice completing the answers.

Bob

jacks
2012-12-20 04:21:46

There are 4  machine and it is known that exactly 2 of them are faulty.they are tested one by one in a random order

till both the faulty machine are identified.. Then the probability that only 2 tested are needed, is

plz explain using tree Diagram.

Thanks

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