General Probability

Question 1

What is Conditional Probability

Answer 1

P(A|B)

ex: venn diagram or a tree

Question 2

P(A or B)

Answer 2

P(A) + P(B) - P(A and B)

Question 3

Conditional Probability Formula

Answer 3

P(A|B) = P(AnB)/P(B)

Question 4

Independence

Answer 4

Is P(A) × P(B) = P(A and B)?
Is P(B|A) = P(B)?
Is P(A|B) = P(A)?
If yes then the events are independent.

Question 5

Independent Events

Answer 5

P(AandB)=P(A)P(B/A)=P(A)P(B)

Question 6

Conditions of Binomial Distribution

Answer 6

1) Only 2 outcomes: Success or failure
2) Probability of success the same for each trial
3) Trials are independent
4) There are a fixed number of trials. A random variable, X, will count the number of successes