Math Help - dice and cube problem

1. dice and cube problem

(1) Three dice are throiwn simultaneously.The probability that $4$ has appeared on two dice given that $5$ has occured on one dice.

(2) An ordinary cube has $4$ blank faces, one face marked $2$ and other face marked $3$. The probability of obtaining $12$ in $5$ throws in

2. Originally Posted by jacks
(1) Three dice are throiwn simultaneously.The probability that $4$ has appeared on two dice given that $5$ has occured on one dice.

(2) An ordinary cube has $4$ blank faces, one face marked $2$ and other face marked $3$. The probability of obtaining $12$ in $5$ throws in
(1) Apply the conditional probability formula (easily visualised with a tree-diagram).

(2) Draw a partial tree diagram and use it.

If you need more help, please show what you've tried and say where you get stuck.

3. explanation plz

thanking you.

4. Originally Posted by jacks
explanation plz

thanking you.
Originally Posted by MrF
If you need more help, please show what you've tried and say where you get stuck.
Show what you've tried plz.

thanking you.