Hi

I have an excel/maths problem which i am having trouble with.

I have the probabilities of a number of events happening (11/725, 1/48, 1/36, 1/18) (there are a few of each). I want to work out the probability of all of them happening within a certain time limit.

Each event can only happen on it's own, for instance once the 11/725 event has happened, the 1/48 event then has a chance of happening, etc.

If each event can only happen once every minute, can i work out the probability that they all happen within 360 minutes? Or actually any random number of minutes?

Thanks

Sorry if it is not really excel help, although it's Excel i'm trying to use!

James