| 1. |
Four Dice Are Thrown Simultaneously. Find The Probability That All Of Them Show The Same Face? |
|
Answer» The total number of ELEMENTARY EVENTS associated to the random experiments of throwing FOUR dice SIMULTANEOUSLY is: = 6*6*6*6=64 n(S) = 64 Let X be the event that all dice show the same face. X = { (1,1,1,1,), (2,2,2,2), (3,3,3,3), (4,4,4,4), (5,5,5,5), (6,6,6,6)} n(X) = 6 Hence required probability = n(X)n(S)=6/64=1216. The total number of elementary events associated to the random experiments of throwing four dice simultaneously is: = 6*6*6*6=64 n(S) = 64 Let X be the event that all dice show the same face. X = { (1,1,1,1,), (2,2,2,2), (3,3,3,3), (4,4,4,4), (5,5,5,5), (6,6,6,6)} n(X) = 6 Hence required probability = n(X)n(S)=6/64=1216. |
|