Random

Random: An event in which every Outcome has an equal chance of occurring. 

                 ex. Flipping a coin, Spinning a spinner, Rolling a dice, and Selecting a card.

Not random: 

Spinning a spinner with one unequal side.

Goldilocks sits on chairs and eats porridge. How many possible outcomes are there?

There are 9 possible outcomes. 1/9 and 1:9 and 1%.

Q: Does Goldilocks choose the chair and porridge at Random? Explain your answer.

A: No, she has a choice and preference.

She is picking the one she likes.

*If you have a choice, It's not random.

Q: What is the probability of Goldilocks picking just the right porridge? 

A: 100%, Goldilocks picks it.

A marble is randomly selected from a bag containing one blue, one red, and one green. Then, a four sided die labeled 1, 2, 3, and 4 is rolled.

a)Create a table to show the Sample Spacer.

b) What is the probability of choosing any colour, and rolling any number but 3.

c) What is P(blue or green, a number greater than 1)?

d) What is P(black, 1)?

e) What is the probability that a red, green or blue marble is selected and the die displays a 4?

ANSWERS:

a)

b)9/12= 3/4 and 3:4 and 75%

c)6/12= 1/2 and 50%

d)0/12 and 0:12 and o% (impossible event)

e) 3/12= 1/4 and 1:4 and 25%

Homework:

A four sided die is labelled 1, 2, 3 and 4. 

A spinner divided into 5 equal parts: fly, swim, hop, glide and walk.

a) Create a table and sample spacers.

b) What is P(3, swim)?

c) What is P(odd#, hop)?