# dice and cube problem

• Feb 18th 2011, 04:37 PM
jacks
dice and cube problem
(1) Three dice are throiwn simultaneously.The probability that \$\displaystyle 4\$ has appeared on two dice given that \$\displaystyle 5\$ has occured on one dice.

(2) An ordinary cube has \$\displaystyle 4\$ blank faces, one face marked \$\displaystyle 2\$ and other face marked \$\displaystyle 3\$. The probability of obtaining \$\displaystyle 12\$ in \$\displaystyle 5\$ throws in
• Feb 18th 2011, 05:46 PM
mr fantastic
Quote:

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

(2) An ordinary cube has \$\displaystyle 4\$ blank faces, one face marked \$\displaystyle 2\$ and other face marked \$\displaystyle 3\$. The probability of obtaining \$\displaystyle 12\$ in \$\displaystyle 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, 08:03 PM
jacks
explanation plz

thanking you.
• Feb 19th 2011, 02:42 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.