Probability

Question 1

P always between

Answer 1

0 and 1

Question 2

P’(A)

Answer 2

1-P(A)

Question 3

Mutually Exclusive; Disjoint: think of a=the diagram (no overlapping circles)

Answer 3

If it is impossible for both to happen at the same time; P (A and B)=0

Question 4

Independence

Answer 4

One event does not effect the other

Question 5

P(A or B)

Answer 5

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

Question 6

P A and B; when independent

Answer 6

P(A)*P(B)

Question 7

P(A and B) dependent events

Answer 7

P(A|B)*P(B);

Question 8

Binomial “exact”

Answer 8

Several tries of one event; doesn’t matter if I flip one coin five times or five coins one time; probability is usually given; number of trials is decided before hand; within those trials how many times does something happen;
p(getting exactly 2 fives)= (1/6)squared and 5/6eight* 10C2(different ways in which you can get two fives);

nCrP^r(1-p)^(n-r)

Question 9

At least one

Answer 9

1-p(none)

Question 10

Again does order matter?

Answer 10

Probability of choosing a 3 person committee with Alice and not Bob; 8 people

Den: 8C3
Num: A _ _; 6C2
Order here does not matter

Question 11

When coins,dice, inanimate obj

Answer 11

Algebra rules

Question 12

Mutually exc, indep, which rules

Answer 12

Algebra

Question 13

Selection; which p rule to use

Answer 13

Counting technique