**Unformatted Text Preview**Question 5 of 10
Suppose you're playing a game where you roll two dice. If you get doubles on
or before the fourth roll you win the game. What's the probability of winning?
0 A. geometpdf(1/6,4)
¢© B. geometcdf(1/6,4)
O c. P(X= 1)+ P(X= 2) + P(x: 3) + p(X= 4)+ P(X: 5)
O 0- (5/6)4(1/6)
Q E. (5/6)4(1/6) + (5/6)4(1/6) + (5/6)4(1/6) + (5/6)4(1/6)
\/ Correct
Correct! You want the probability of getting doubles on or before the fourth try. The
function geometcdf(1/6,4) gives you the sum of the probabilities of
P(success on ﬁrst try) + P(success on second try) + P(success on third try)
+ P(success on fourth try). which equals .5177.
NEXT QUESTION