Probability PowerPoint notes

1. REVIEW

2. How many two – digit
numbers can be formed
from the integers 1, 2,
3, and 4 if repetition of
digits are not allowed?

4. “Puwede
pa ba
tayo?”
“Mapapansin
kaya ako ni
crush
ngayon?”
“May
Pag-asa
pa ba?”
“ Sasagutin
kaya niya
ako?”

5. Probability of
an Event

6. Initial
Answer
Revised
Answer
Final Answer
*
IRF CHART:
Describe Probability in
your own standpoint

7. What to expect?
At the end of the lesson, the students
must be able to:
1. Describe Probability.
2. Determine the Probability Rules.
3. Find the probability of a simple event.
4. Solve problems involving simple
probability.

8. Probability is a measure
or estimation of how
likely it is that an event
will occur

9. Formula
P( E ) =
=

10. Probability Rules
1. The probability of any event is a number
(either a fraction, a decimal, or a percent)
from 0 to 1.
2. If an event will never happen, then its
probability is 0.
3. If an event is sure to happen, then the
probability is 1.
4. The sum of the probabilities of all the
outcomes in the sample space is 1.

11. Sample
Problems

12. 1. The spinner may stop on any one of the eight
numbered sectors of the circle. ( Assume
that the spinner will not stop on the line
between two sectors).Find the probability that
the spinner stops in 5.

13. 2 . A single die is rolled.
What is the probability of
rolling a number that is a
prime number?

14. 3. Cherry has a box that contains
8 blue balls, 5 red balls, 3 yellow
balls, and 4 white balls. What is
the probability that if she choose
a marble from the box without
looking, or at random, she will get
a white ball?

15. 4. Consider a well-shuffled standard deck of
52 cards. There are 4 suits of cards:
hearts( red), diamonds( red), spades( black),
and clubs( black). Each suit contains 13 cards:
Ace, 2, 3, ….,9,10, king, queen, and jack
If a card is taken at random from the deck,
find the probability of drawing the following:
a. Getting an Ace
b. Getting a face card

16. Initial
Answer
Revised
Answer
Final Answer
*
IRF CHART:
Describe Probability
in your own
standpoint

17. Math Quiz Bee:
“May Chance
pa ba?”

18. Mechanics:
1. This Math Quiz Bee is composed of 10
items questions. The questions were all
about solving problems involving the
probability of an event
2. Time duration per question: 30 seconds
3. Each group will be given a board. This is
where you are going to write your answers.
4. For uniformity in answers, answers must be
expressed in a simplified fraction

19. 5.On the first question, the group
leader will be the one to write
the answer on the white board
provided. On the next question,
he/she will pass the white board
on the member on his/her left
side. Same pattern will follow on
the succeeding questions.

20. 6.Once the time is up,
you are just allowed to
raise your boards once
I told you to do so.

21. 1. A single die is rolled. What is
the probability of rolling a
number that is greater than
4?

22. P(greater than 4) =

23. 2. A bag contains 8 marbles
numbered 1 to 8. What is the
probability of selecting an
odd number?

24. P(odd) =

25. 3. Jerick is asked to choose a
day from a week. What is the
probability of choosing a day
which starts with S?

26. P(starts with s) =

27. 4.In a 500-ticket draw for an
educational prize, Jefferson’s
name was written on 50 tickets.
What is the probability that he
would win?

28. P(win) =

29. 5.Each of the letters in the word
CALCULATOR are on a separated cards
face down on the table. If you picked a
card at random, what is the probability
that it is letter C?

30. P(letter C) =

31. 6. Cherry has a box that contains 8 blue
balls, 5 red balls, 3 yellow balls, and 4
white balls. What is the probability that if
she choose a marble from the box without
looking, or at random, she will get a non-
yellow marble?

32. P(not yellow) =

33. 7. A box contains 7 red balls, 5 orange
balls, 4 yellow balls, 6 green balls, and 3
blue balls. What is the probability of
drawing out an orange ball?

34. P(orange) =

35. 8. In a bowl, slips of paper were
numbered from 1 to 12. What is
the probability of getting a prime
number?

36. P(prime) =

37. 9. In a standard deck of 52
cards, find the probability of
drawing a jack.

38. P(jack) =

39. 10. The local weather forecaster said
that there is a 20% chance of rain
tomorrow. What is the probability
that it will not rain tomorrow?

40. P(it will not rain) =

41. Initial
Answer
Revised
Answer
Final Answer
*
IRF CHART:
Describe Probability in
your own standpoint

42. Ponder on this….
For I know the plans I have for
you, declares the Lord, plans
for welfare, and not for evil,
to give you a future and a hope
Jeremiah 29:11(ESV)

43. Quiz: On a ½ crosswise, solve the
given problem.
Of the 45 students in a class, 25
are boys. If a student is selected
at random for a field trip, what is
the probability of selecting a girl?

44. Assignment
A. On a ½ crosswise, answer the given
problem.
The sides of a cube are numbered 11 to 16. If Jan
Renz rolled the cube once, what is the
probability of rolling a composite number?
B. Read and study about the Addition Rule of
Probability( Mutually and Non-Mutually
Exclusive Events)