Jonjon

x,y,z are positive integers. find all triples that work

4,cw

x = 20 because x+30=3x-10, so 2x=40, and x=20.

There is a problem with the picture.

1200  factors  as      2^4 * 3  * 5^2 =   2 * 2 * 2 * 2 * 3 * 5 * 5  =  4 * 4 * 3 * 5 * 5

So....the number of different identifiable roll sequenes  =

        5!                        120      

    _______  =            ____    =     30

     2!  * 2!                      4

Hi Guest! This is the harmonic mean problem. The answer is $\frac{2}{\frac{1}{30} + \frac{1}{20}}=24$

who is good at probability? Cphil?

who is online right now?

what do you mean?

I forgot. Please help though. I beg you.