Binomial Disributions

Question 1

What do you use when the objects are the same?

Answer 1

n! / x!

Question 2

What do you use when you have n objects but x of these are identical to each other?

Answer 2

n! / x! (n-x)!

Question 3

What is the binomial distribution formula?

Answer 3

(NcX) x P of S (^x)x P of F ^( n-x)

Question 4

What are the 5 conditions?

Answer 4

1. fixed no.of trials
2. each trial includes success or failure
3. all trials are independent
4. P of success is the same each trial
5. variable is the total no.of successes in the n trials

Question 5

What is the probability of successes in trials?

Answer 5

(nCx) x [P(success)]^x x [P(failure)]^n-x