Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**jacks****Member**- Registered: 2012-11-21
- Posts: 77

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

Offline

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,268

hi

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

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

Pages: **1**