quiz 4

Question 1

counting rule for permutations:

Answer 1

involves ordering or permutations

Question 2

the number of ways to arrange an entire set of n distinct items is…

Answer 2

n!

Question 3

sometimes the ordering or arrangements isn’t important, but only the objects that are chosen. In this case. you can use a counting rule for…

Answer 3

combinations

Question 4

The # of combinations and the # of permutations are related

Answer 4

C(n,r)= P(n,r)/P(r,r)

Question 5

The ___ of events A and B, denoted by A∪B , is the event that either A or B or___ occur

Answer 5

UNION, both

Question 6

The _____ of events A and B, denoted by A∩B is the even that both A and B occur

Answer 6

INTERSECTION

Question 7

The ______ of an event A, denoted by A^c, is the event that A ______ occur

Answer 7

COMPLEMENT, does not

Question 8

probability rule for union

Answer 8

addition rule

Question 9

Given 2 events, A and B, the probability of union, A∪B is equal to…

Answer 9

P(A∪B)= P(A)+P(B)-P(A∩B)

Question 10

When two events, A and B, are mutually exclusive or_______, it means that when A occurs, B can’t, and vice versa

Answer 10

disjoint

Question 11

simple events are…

Answer 11

mutually exclusive

Question 12

A and A-comp are

Answer 12

mutually exclusive

Question 13

when A and B are mutually exclusive then P(A∩B)= ____

Answer 13

zero, 0

Question 14

when A and B are mutually exclusive then P(A∩B)=0
Addition rule simplifies to….

Answer 14

P(A∪B)= P(A)+P(B)

Question 15

Rule for complements

Answer 15

P(A^C)= 1- P(A)

Question 16

There is a rule that can be used to calculate the probability of the intersection of several events. This rule depends on the concept of _____ or _______

Answer 16

independent, dependent events

Question 17

2 events, A and B, are ________ if and ONLY if the probability of B _______ influenced or changed by the occurrence of event A and vice versa

Answer 17

independent, is NOT

Question 17

Are 2 simple events of the same experiment independent?

Answer 17

NO, if one happens the other can not happen

Question 18

Event A: observe a 2 on the first toss
Event B: observe a 2 on the second toss
Independent?????

Answer 18

YESSS, because the probability of event B is not changed by the occurrence of event A.

Question 19

0!=

Answer 19

1

Question 20

the union of A and its complement form …

Answer 20

the sample space

Question 21

probability table

Answer 21

probability table!