# dice and cube problem

• Feb 18th 2011, 05:37 PM
jacks
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
• Feb 18th 2011, 06:46 PM
mr fantastic
Quote:

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.
• Feb 18th 2011, 09:03 PM
jacks
explanation plz

thanking you.
• Feb 19th 2011, 03:42 AM
mr fantastic
Quote:

Originally Posted by jacks
explanation plz

thanking you.

Quote:

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.