Probability is the chance that something is likely to happen

Event - is any possible outcome of an experiment probability

Example You spin a spinner that is numbered from 1-8. An outcome could be a 5.

Total Possible Outcomes -All possible results of an experiment

Example You spin a spinner that is numbered from 1-8. TPO are 1, 2, 3, 4, 5, 6,7 and 8.

Independent Event -Event whose outcome do not influence each other

Example You spin a spinner that is numbered from 1-8. Getting a 7 doesn't influence getting a 3.

Theoretical Probability - The mathematical calculation that an event will happen in theory

Example If you flip a coin 100 times heads should come up 50 times and tails should come up 50 times.

Experimental Probability - The ratio of the number of times an outcome occurs to the total amount of trials performed

Example If you flip a coin and heads comes up 5 out of the 6 times

Problem: You have a jar that has 3 red marbles, 5 blue marbles, and 7 green marbles. What is the chance of pulling out a red marble?

First you find the total amount of marbles (T.P.O.) 3+5+7=15.

Then you find calculate the amount of red marbles to all the marbles. 3/15, (3 red)/(All marbles).

Then you can turn it into a percent 3 divided by 15 = 0.2 x 100 = 20%.

You have a 20% of pulling out a red marble.

Problem: You have a spinner  that has 5 different colours blue, green, orange, purple, and pink. What is the chance of spinning on the purple section. Like before you find out the T.P.O. (Total Possible Outcomes)  that is 5 because there is  5 colours. Puprle is the F.O.(Favourable Outcome) that is 1 because there is only 1 purple section(assuming that all the sections are the same size). So the chance of spinning a purple is 1/5 or or 0.2 or 20%.