Unlocking of Termsa. Probability a measure of how likely is an event to

appearb. Experiment activity involving chance that can have

different resultsc. Outcome results of a probability experimentd. Event specific result of a probability experimente. Theoretical probability a way of estimating of what is expected

to happen in an ideal situation.

Rules in Group Activities

G – et alongR – espect othersO – n task U – se soft voicesP – articipate

Activity

“HEADS AND

TAILS”

EXPERIMENTAL

PROBABILITY

Experimental Probability

the probability of an outcome of an event based on an experiment.

Based on what actually happens

P =

ExampleUsing buttons of different colors 5 violet, 4 yellow, 9 red, 8 blue, 6 black, and 3 pink buttons in a jar. If a single button is drawn 40 times one at a time then putting it back to the jar. What is the probability of choosing: a. Red buttons? b. Green buttons? c. Blue buttons?d. Yellow buttons?

Complete Me!1. Experimental Probability is

________________________________.2. The formula in finding the

experimental probability is ________________________________.

3. In real life, I can use probability in ________________________________.

4. The difference between theoretical and experimental probability is __________________________________

“Numbered Heads

Together”

Numbered Heads Together• The class will be divided into

groups consisting of 4 members each.

• Group members represents a number from 1 to 4.

• The problem will be posted and you will be given 30 seconds to answer it as a group. Write your answer on the illustration board.

• The teacher will spin the two spinners to determine who will explain their answers

1. Yaya Dub made an experiment consists of spinning a spinner. Use the results in the table to estimate that on the next spin:

Colors OutcomesGreen 15

Orange 10Purple 8Pink 7

TOTAL 40

a. the spinner will land on green;

Answer

1. Yaya Dub made an experiment consists of spinning a spinner. Use the results in the table to estimate that on the next spin:Colors Outcomes

Green 15Orange 10Purple 8Pink 7

TOTAL 40

b. the spinner will land on orange;

Answer

1. Yaya Dub made an experiment consists of spinning a spinner. Use the results in the table to estimate that on the next spin:Colors Outcomes

Green 15Orange 10Purple 8Pink 7

TOTAL 40

c. the spinner will land on blue;

Answer

1. Yaya Dub made an experiment consists of spinning a spinner. Use the results in the table to estimate that on the next spin:Colors Outcomes

Green 15Orange 10Purple 8Pink 7

TOTAL 40

d. the spinner will NOT land on pink.

Answer

1. Yaya Dub made an experiment consists of spinning a spinner. Use the results in the table to estimate that on the next spin:Colors Outcomes

Green 15Orange 10Purple 8Pink 7

TOTAL 40

e. Based on the experiment, which color will the spinner most likely to land

AnswerThe color is most likely to land on

green.

2. The neighbor’s dog barked at Rica the last 4 out of 5 times she walked by their house. a. What is the

experimental probability that the dog barks at Rica when she walked by their house?

ANSWER

b. What is the experimental probability that the dog will not bark at Rica when she walked by their house?

2. The neighbor’s dog barked at Rica the last 4 out of 5 times she walked by their house.

ANSWER:1/5 or 20%

“Individual Tasks”

Solve the following:Sandra rolled the die several times and recorded the results in the table.

Find the experimental probability that on the next roll, the die will land on:a. 1b. 3c. 7d. Even numbere. Greater than 5

Side 1 2 3 4 5 6Outcome 12 25 14 21 18 10

Answersa. 12/100 or 12%b. 14/100 or 14%c. 0/100 or 0%d. 56/100 or 56%e. 10/100 or 10%

“HOMEWORK”Make at least 3 experiment using what you have seen outside the school and find the experimental probability of each experiment.