Question

suppose you roll a 6 sided die 10 times. What's the probability of getting three fives in those 10 rolls?
A. .155
B. .60
C. .30
D. .000618
E. .930
Would you do Binomcdf (10,1/6,3) on your calculator to find this?

Answer 1

6|10 is.6

Answer 2

yea i think u would

Answer 3

yes you will use binomial distribution, but not the cumulative one. That would tell you prob of getting at least 3 fives in 10 rolls

Answer 4

\[\left(\begin{matrix}10 \\ 3\end{matrix}\right) (\frac{1}{6})^3 (\frac{5}{6})^7 = 0.155\]

Answer 5

okay that makes sense, thank you!