Probability and expected outcomes

Simple Probability

100

If a single coin is flipped, what is the probability that the coin lands on HEADS?

1/2 or 50%

200

If a six-sided dice is rolled, what is the probability of rolling a THREE or FIVE?

2/6 or 1/3 or 33%

300

I have 6 purple socks and 7 black socks.

What is the probability I pick a blue sock?

0

400

If a card is pulled at random from a deck, what is the probability the card pulled is a QUEEN?

4/52 or 1/13 or 7.7%

500

I have a bag with 9 marbles.

There are 2 blue marbles, 3 red marbles and the rest are orange. What is the probability I pick an orange marble?

4/9 or 44.4%

Expected Outcome

100

If a coin is flipped six times, how many times would you predict the coin will land on HEADS?

1/2 times 6 = 3

200

If a six-sided dice is rolled 30 times, how many times would you predict the dice to land on THREE?

1/6times30=5

300

Three RED blocks and Seven GREEN blocks are in a pile together.

If you pull 20 blocks from the pile and put each block back after each pull, how many times would you predict a RED block is pulled?

3/10times20=6

400

If a card is pulled at random from a deck 52 times, and that card is returned each time, how many times would you predict to pull a QUEEN?

1/13times52=4

500

Seventeen student are in a classroom. There are 6 BOYS and 11 GIRLS.

If you pull students at random 102 times, how many times do you predict a GIRL is pulled from the group?

11/17times102=66

Vocabulary

100

How likely is something to happen?

Probability

200

the result of an event

Outcome

300

Define estimate

A reasonable calculation or approximation

400

Define fair

All outcomes are equally as likely

500

What should occur based on probability

Expected outcome

Expected Outcomes pt 2

100

If you flip a coin 10 times, how many times do you expect to get tails?

5

200

True or false, you WILL get heads exactly 30 times if you flip a coin sixty times.

False

300

If I roll a dice 60 times and roll a "1" 10 times, would you say the dice is fair?

Yes

400

Why might the actual outcome be different from the expected outcome?

Because probability predicts what should happen, not what will happen every time.

500

The expected outcome of something after 20 trials is 4. What is the probability?

4/20 or 0.2