Language of probability
what is an event
an outcome of an experiment
(What you want to happen)
what is the formula for theoretical probability
number of times event occurs / total number of outcomes
given the experimental results
1,3,4,3,3,4,2,1,4,6
what is the probability of getting a 4
3/10
Given a spinner that is evenly split into 5 colours, orange, purple, pink, blue and red. What is the probability of landing on orange.
Write your answer as a percentage.
1/5
= 20%
what term describes a set of all possible outcomes
sample space
what words describe likelihood (in order)
certain, likely, even chance, unlikely, impossible
what is the probability of selecting an 'O' out of the word OWL
1/3
given the experimental data
blue, blue, red, purple, yellow, yellow, red, blue, orange
what is the experimental probability of selecting a purple?
3/9
= 1/3
If a bag has 3 pens, 6 pencils and 6 markers.
What is the probability of selecting a pen or a pencil?
9/15
what term is used to describe when an event is guaranteed to occur
certain
what number represents impossible
0
what is the theoretical probability of selecting a blue marble out of a bag with
3 red marbles, 2 blue marbles and 1 green marble
2/6
= 1/3
given the experimental data
blue, blue, red, purple, yellow, yellow, red, blue, orange
what is the experimental probability of selecting a purple?
0
what is the probability of rolling a 2 on an 8 sided dice. Write your answer as a decimal.
0.25
what term describes the likelihood of an event that has a higher chance of occurring than not
likely
what number represents certain
1
what is the probability of rolling a 6 on a normal 6 sided dice
1/6
if a dice was rolled and the following results were obtained
1,2,3,3,2,4,5,6,2,3,4,1
how any times would you expect a 3 if the dice was rolled 200 times
pr (3) x number of trials
= 3/12 x 200
= 50 times
what term describes and event that has a lower chance of occurring than not
unlikely
what is the likelihood of flipping a coin and it landing on heads
even chance
What is the probability of landing on purple when spinning a spinner that has an even chance of landing on orange and a quarter chance of landing on purple or blue.
1/4
if a dice was rolled and the following results were obtained
1,2,3,3,2,4,5,6,2,3,4,1
how many times would you expect to get a 2 or a 3 if the dice was rolled 700 times
pr(2,3) x number of trials
= 6/12 x 700
= 350
what term describes the number of times you conduct an experiment
Trials