Question
Q: A coin is tossed 9 times. How many ways could the result be 6 heads and 3 tails?
Answer is 84 ways
If you could explain the process on how you get the answer that would be really helpful because I always get stuck on this kind of question... thanks!
Answer is 84 ways
If you could explain the process on how you get the answer that would be really helpful because I always get stuck on this kind of question... thanks!
Answers
jolly rancher
C(9,6) = C(9,3) = 84
or combinations of 9 items taken 6 (or 3) at a time
or combinations of 9 items taken 6 (or 3) at a time
Milan
Thank you @jollyrancher I don't know why I didn't do that before...
jolly rancher
welcome
Marija
you have 9 options, 6 are the same and 3 are the same, so you do 9!/6!3!=84