2. S
A C
Question:
Traffic officer carry out check
on motorists. The result is 25
person have SIM A, 30 people
have SIM C, 17 people have
SIM A and SIM C, while 12
people do not have SIM A and
SIM C. How many motorists
were checked?
SIM A: 25 = 25 – 17 = 8
SIM C: 30 = 30 – 17 = 13
have 2 SIM: 17
Doesn’t have SIM: 12
S = ?
S = 8 + 13 + 17 + 12
S = 30 + 20
S = 50
8
1317
12
3. S
MATH PHYSIC
Question
Of the 44 students in
the class, there are 30
students liked math and
26 students are found
of physics. If 3
students are not found
of the second lesson,
how many students who
like both the lesson
S: 44
MATH: 30
PHYSIC: 26
NOT BOTH: 3
BOTH: ?
30 – x + x + 26 – x = 44 – 3
56 – x = 41
56- 41 = x
15 = x
15
15
11
3
4. S
POP CLASSIC
Question
In the event the survey
of prediction of music
data showed that in
class III, 15 person love
pop music and 20 people
fond of classical as well
as 10 people are not
found of pop music and
classical music, how
many third graders?
Pop: 15 : 15 – 5 = 10
Classic: 20 : 20 – 5 = 15
Both: 5
Not both: 10
S = ?
S = 10 + 15 + 5 + 10
S = 40
10 5
15
10