In a binomial distribution, n = 9 and π(Pi) = .25. Find the probabilities of...

Hello,
This is problem I have been stuck on for quite a while. It is a homework problem and I have no idea what to do nor what formula to use. Any help would be greatly appreciate! Thanks!

In a binomial distribution, n = 9 and π(Pi) = .25. Find the probabilities of the following events. (Round your answers to 4 decimal places.)

a. x = 3

Probability = ?


b. x ≤ 3

Probability = ?


c. x ≥ 4

Probability = ?

zZ ENiGMa said:

In a binomial distribution, n = 9 and π(Pi) = .25. Find the probabilities of the following events.

a. x = 3
b. x ≤ 3
c. x ≥ 4

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What formulas have they given you for this? Which have you tried to apply? How far did you get?

When you reply, please include all formulas which you think might apply, and show completely how far you got on whichever you attempted to use. Thank you!