Chap 8 - probability

Question 1

2 types of probability

Answer 1

-theoretical
-expermental

Question 2

define theoretical probability

Answer 2

what should happen

Question 3

define experimental probability

Answer 3

what actually happened

Question 4

formula for theoretical probability

Answer 4

P(x) = what should happen x no. trials

Question 5

formula for probability

Answer 5

P(x) = no. times happens x no. trials

Question 6

symbol of probability of something not happening

Answer 6

P(x)’

Question 7

how to show probability

Answer 7

sample space +/x

Question 8

note: 52 cards in a deck, 26 white/ black, 13 in each suit (assume no joker)

Question 9

note: use a tree diagram to help

Question 10

and - ( x )
or - ( + )

Question 11

probability for heads or tails

Answer 11

1/2 + 1/2 = 1

Question 12

deck of cards:
52 cards
4 suits - 13 in each
26 black, 26 white

Question 13

note: be careful if there is replacement or not