rolling a die, waiting for [5]

[mexx]

exercise: p = 1/6 you roll a die and wait for the number 5 on the die.

what outcome is to be expected here? why?

or if you can't answer the question, what can't be expected?


help me :roll:

 

[tkhunny]

Odd Response

If you roll a die and you get a five, your wait is over.
If you roll a die and don't get a five, you will have to wait for an earthquake or something or it will just sit there for a very long time.

Unambiguous questions are very valuable.

If you roll a die over and over and over, there is no guarantee that you EVER will get a five. If it is a fair die, or a die of known bias, you can expect to get some number of fives, but the probability of getting no fives at all is NOT EVER zero!

I'm not sure if that answers your question.

 

[pka]

The expected number of independent trials we need perform until we attain the first success equals the reciprocal of the probability that any one trial results in a success.