A fair die is rolled 50 times. Find the probability of observing:
a) exactly 10 sixes
b) no more than 10 sixes
c) at least 10 sixes
I know how to do
a) $\frac{50!}{10!(40!)}$x$(\frac{1}{6})^{10}$x$(1-\frac{1}{6})^{50-10}$
=0.1155
Please help me out to do b) & c) I have tried same formula above and changing power to 9, 11 etc... But Can't get right answer.!
Appreciate your help!