2. 1. A die is rolled once. Find
the probability of
obtaining a 1?
N=_____
n=_____
P(E)=______
3. 2. A die is rolled once.
Find the probability of
obtaining a number less than
6?
N=_____
n=_____
P(E)=______
4. 3. A die is rolled once.
Find the probability of
obtaining a number greater
than 4?
N=_____
n=_____
P(E)=______
5. 4.A box contains 5 red balls, 7
yellow balls, and 6 blue balls. If
a ball is pick at random from the
box, what is the probability that a
ball picked is a Yellow ball?
N=_____
n=_____
P(E)=____
6. 5.A box contains 5 red balls, 7
yellow balls, and 6 blue balls. If
a ball is pick at random from the
box, what is the probability that a
ball picked is a Red ball?
N=_____
n=_____
P(E)=____
7. 6.A box contains 5 red balls, 7
yellow balls, and 6 blue balls. If
a ball is pick at random from the
box, what is the probability that a
ball picked is a Blue ball?
N=_____
n=_____
P(E)=____
9. P R O B A B I L I T Y
The theory of probability
was founded in the 17th
century by two French
mathematicians Blaise
Pascal and Pierre
Fermat.It began with
problems related to the
games of chance.
18. PROBLEM 1: A die is rolled
once. Find the probability
of obtaining a 5?
N=6; n=1
𝑷 𝑬 =
𝒏
𝑵
𝑷 𝒐𝒃𝒕𝒂𝒊𝒏𝒊𝒏𝒈 𝒂 𝟓 =
𝟏
𝟔
Take note:
N=1,2,3,4,5,6
19. PROBLEM 1: A die is rolled
once. Find the probability
of obtaining a 6?
N=6; n=1
𝑷 𝑬 =
𝒏
𝑵
𝑷 𝒐𝒃𝒕𝒂𝒊𝒏𝒊𝒏𝒈 𝒂 𝟔 =
𝟏
𝟔
20. PROBLEM 2: A box contains 3 red
balls, 5 yellow balls, and 2 blue
balls. If a ball is pick at random
from the box, what is the
probability that a ball picked is a
Yellow ball?
N=3+5+2=10
n=5
𝑷 𝑬 =
𝟓
𝟏𝟎
=
𝟏
𝟐
𝑷 𝒑𝒊𝒄𝒌𝒊𝒏𝒈 𝒚𝒆𝒍𝒍𝒐𝒘 𝒃𝒂𝒍𝒍 =
𝟏
𝟐
21. PROBLEM 2: A box contains 3 red
balls, 5 yellow balls, and 2 blue
balls. If a ball is pick at random
from the box, what is the
probability that a ball picked is a
Red Ball?
N=3+5+2=10
n=3
𝑷 𝑬 =
𝟑
𝟏𝟎
𝑷 𝒑𝒊𝒄𝒌𝒊𝒏𝒈 𝒓𝒆𝒅 𝒃𝒂𝒍𝒍 =
𝟑
𝟏𝟎
22. PROBLEM 2: A box contains 3 red
balls, 5 yellow balls, and 2 blue
balls. If a ball is pick at random
from the box, what is the
probability that a ball picked is a
Blue Ball?
N=3+5+2=10
n=2
𝑷 𝑬 =
𝟐
𝟏𝟎
=
𝟏
𝟓
𝑷 𝒑𝒊𝒄𝒌𝒊𝒏𝒈 𝒃𝒍𝒖𝒆 𝒃𝒂𝒍𝒍 =
𝟏
𝟓
23. PROBLEM 1: A die is rolled
once. Find the probability
of obtaining an odd number?
N=6; n=3
𝑷 𝑬 =
𝒏
𝑵
𝑷 𝒐𝒃𝒕𝒂𝒊𝒏𝒊𝒏𝒈 𝒂𝒏 𝒐𝒅𝒅 𝒏𝒖𝒎𝒃𝒆𝒓 =
𝟑
𝟔
=
𝟏
𝟐
Take note:
n=1, 3, 5
24. PROBLEM 1: A die is rolled
once. Find the probability of
obtaining an even number?
N=6; n=3
𝑷 𝑬 =
𝒏
𝑵
Take note:
n=2, 4, 6
𝑷 𝒐𝒃𝒕𝒂𝒊𝒏𝒊𝒏𝒈 𝒂𝒏 𝒆𝒗𝒆𝒏 𝒏𝒖𝒎𝒃𝒆𝒓 =
𝟑
𝟔
=
𝟏
𝟐
27. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Give the sample space of combination of rice, viand ,
and drink. How many possible outcome are there?
28. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
List the possible outcomes of selecting any lunch with
pineapple juice.
29. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
How many outcomes are there for selecting any lunch
with pineapple juice.
30. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
How many outcomes are there for selecting a lunch
with steamed rice and with pineapple juice?
31. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
How many outcomes are there for selecting a lunch
with chicken adobo and with pineapple juice?
32. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
How many outcomes are there for selecting a lunch
with pinakbet and orangejuice?
33. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
What is the probability that the student chose
pineapple juice as a drink?
34. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
What is the probability that the student chose steamed
rice and pineapple juice as a drink?
35. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
What is the probability that the student chose chicken
adobo and orange juice?
36. RICE VIAND DRINK
Fried rice
Steamed rice
Chicken adobo
Pinakbet
Chicken adobo
Pinakbet
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
Pineapple juice
Orange Juice
What is the probability that the student chose pinakbet
and pineapple juice?
41. Problem 1A:
A standard playing card has 52 cards: 4
suits (heart, club, diamond, spade). Each
suit has 9 numbers (2 to 10) and ace, king,
queen, jack
If a card is drawn, find the probability of
getting a diamond.
N=52; n=13
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝒂 𝒅𝒊𝒂𝒎𝒐𝒏𝒅 =
𝟏𝟑
𝟓𝟐
=
𝟏
𝟒
42. Problem 1B:
A standard playing card has 52
cards: 4 suits (heart, club,
diamond, spade). Each suit has
9 numbers (2 to 10) and ace,
king, queen, jack
If a card is drawn, find the probability of
getting an ace.
N=52; n=4
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝒂𝒏 𝒂𝒄𝒆 =
𝟒
𝟓𝟐
=
𝟏
𝟏𝟑
43. Problem 1C:
If a card is
drawn, find the
probability of
getting a face
card.
N=52; n=12𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝒂 𝒇𝒂𝒄𝒆 𝒄𝒂𝒓𝒅 =
𝟏𝟐
𝟓𝟐
=
𝟑
𝟏𝟑
44. Problem 2A:
N=C(52,2)= 1326 n=C(26,2)=325
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝒐𝒇 𝒕𝒘𝒐 𝒃𝒍𝒂𝒄𝒌 𝒄𝒂𝒓𝒅𝒔 =
𝟑𝟐𝟓
𝟏𝟑𝟐𝟔
=
𝟐𝟓
𝟏𝟎𝟐
If 2 cards are drawn from a
standard deck of cards, what is
the probability of getting 2 black
cards?
45. Problem 2B:
N=C(52,2)= 1326
n=C(26,1)·C(13,1)=
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝒐𝒏𝒆 𝒓𝒆𝒅 𝒄𝒂𝒓𝒅 𝒂𝒏𝒅 𝒐𝒏𝒆 𝒔𝒑𝒂𝒅𝒆 =
𝟑𝟑𝟖
𝟏𝟑𝟐𝟔
=
𝟏𝟑
𝟓𝟏
Two cards are drawn from a standard
deck of cards.
What is the probability of getting one
red card and one is spade?
(26)(13)=338
46. Problem 3A:
N=C(12,3)= 220 n=C(4,3)=4
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝟑 𝒑𝒊𝒏𝒌 𝒃𝒂𝒍𝒍𝒔 =
𝟒
𝟐𝟐𝟎
=
𝟏
𝟓𝟓
There are 5 red, 4 pink and 3 blue balls
in an urn.
If you draw three balls at random, what
is the probability that all 3 are pink?
47. Problem 3B:
N=C(12,3)= 220 n=C(5,2)·C(3,1)=10(3)=30
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝟐 𝒓𝒆𝒅 𝒂𝒏𝒅 𝟏 𝒃𝒍𝒖𝒆 =
𝟑𝟎
𝟐𝟐𝟎
=
𝟑
𝟐𝟐
There are 5 red, 4 pink and 3 blue balls in
an urn.
If you draw three balls at random,
what is the probability that 2 are
red and one is blue?
48. Problem 3C:
N=C(12,3)= 220
n=C(3,2)·C(9,1)
𝑷 𝒈𝒆𝒕𝒕𝒊𝒏𝒈 𝟐 𝒃𝒍𝒖𝒆 =
𝟐𝟕
𝟐𝟐𝟎
There are 5 red, 4 pink and 3 blue balls in
an urn.
If you draw three balls at random,
what is the probability that 2 are
blue?
=3(9)=27
49. Problem 4A:
N=48
n=20
𝑷 𝒄𝒉𝒐𝒐𝒔𝒊𝒏𝒈 𝒂 𝒃𝒐𝒚 =
𝟐𝟎
𝟒𝟖
=
𝟓
𝟏𝟐
There are 48 students in Grade 10-
Charity. Twenty are boys and 28 are
girls.
If a teacher randomly selects a student
to represent the class in a school
meeting, what is the probability that a
boy is chosen?
50. Problem 4B:
N=48
n=28
𝑷 𝒄𝒉𝒐𝒐𝒔𝒊𝒏𝒈 𝒂 𝒈𝒊𝒓𝒍 =
𝟐𝟖
𝟒𝟖
=
𝟕
𝟏𝟐
There are 48 students in Grade 10-
Charity. Twenty are boys and 28 are
girls.
If a teacher randomly selects a student
to represent the class in a school
meeting, what is the probability that a
girl is chosen?
51. Problem 4C:
N=C(48,3)
n=C(28,3)
𝑷 𝒄𝒉𝒐𝒐𝒔𝒊𝒏𝒈 𝟑 𝒈𝒊𝒓𝒍𝒔 =
𝑪 𝟐𝟖, 𝟑
𝑪 𝟒𝟖, 𝟑
There are 48 students in Grade 10-
Charity. Twenty are boys and 28 are
girls.
If a committee of 3 students is formed,
what is the probability that all are girls?
52. Problem 4D:
N=C(48,3)
n=C(20,2)·C(28,1)
𝑷 𝒄𝒉𝒐𝒐𝒔𝒊𝒏𝒈 𝟐 𝒃𝒐𝒚𝒔 𝒂𝒏𝒅 𝟏 𝒈𝒊𝒓𝒍
=
𝑪 𝟐𝟎, 𝟐 · 𝑪(𝟐𝟖, 𝟏)
𝑪 𝟒𝟖, 𝟑
There are 48 students in Grade 10-
Charity. Twenty are boys and 28 are
girls.
If a committee of 3 students is formed,
what is the probability that two are boys
and one is girl?
53. Problem 4E:
N=C(48,3) n=C(28,1)·
𝑷 𝒄𝒉𝒐𝒐𝒔𝒊𝒏𝒈 𝒂 𝒈𝒊𝒓𝒍 𝒔𝒆𝒄𝒓𝒆𝒕𝒂𝒓𝒚
=
𝑪 𝟐𝟖, 𝟏 · 𝑪(𝟒𝟖, 𝟐)
𝑪 𝟒𝟖, 𝟑
C(48,2)
Suppose that a team of 3 students is
formed such that it is composed of a team
leader, a secretary, and a spokesperson.
What is the probability that a team
formed is composed of a girl secretary?