Question

Probability !!!
What is the probability of k>or=10, for 15 trials and .75 success probability?

Answer 1

For each k value:
\[P(k) = \left(\begin{matrix}15 \\ k\end{matrix}\right)(.75)^k (.25)^{15-k}\]
do it for k = 10,11,12,13,14,15
add all the probabilities to get final answer

Answer 2

There's no shorter way? My teacher mentioned something about the binomcdf function on the ti-84 calc.. I tried it but how do you specify whether it is greater than, less than, or equal to? @dumbcow

Answer 3

@Directrix