The document contains two examples. The first example provides data on the number and percentage of boys and girls studying different subject combinations. The second example shows data on how students in classes A, B, and C travel to school, including the number of students in each class and traveling each way. It then calculates the number of additional students in class C compared to B and the probability that a randomly selected student is from class A and walks to school.

2. EXAMPLE-1
The dual below shows the number of students in a sixth form
who study certain combination of subjects at A-level.
(i) Calculate the percentage of boys who study each of
the combinations All Science, Mixed Arts and
Science, All Arts.
(ii) Calculate the percentage of girls who study each of
the combinations All Science, Mixed Arts and
Science, All Arts.

3. SOLUTION
(i)
Combinations BOYS %
All Science 24 24
74
× 100 = 32%
Mixed Arts and Science 28 28
74
× 100 = 38%
All Arts 22 22
74
× 100 = 30%
TOTAL 74 100%
(ii)
Combinations GIRLS %
All Science 11 11
61
× 100 = 18%
Mixed Arts and Science 21 21
61
× 100 = 34%
All Arts 29 29
61
× 100 = 48%
TOTAL 61 100%

4. EXAMPLE-2
The diagram below shows how students in classes A, B and C
travel school each day
(i) Write down how many students walk to school.
(ii) Write down the number of students in class A.
(iii) Calculate how many more students there are in class
C than in class B.
(iv) Calculate the probability that a students, chosen at
random, is from class A and walks to school.

5. SOLUTION
(i)
Class Number of Students
A 13
B 8
C 18
TOTAL 39
There are 39 students who walk to School.
(ii)
Class A Number of Students
Cycle to School 5
Walk to School 13
Travel by Bus 14
TOTAL 32
There are 32 students in Class `A`
(iii)
TRAVEL Number of Students
Class B Class C
Cycle to School 3 6
Walk to School 8 18
Travel by Bus 16 8
TOTAL 27 32
There are 32-27 = 5 more students in Class `C`.

6. (iv)
S = walk to School
S = Class A + Class B + Class C
n(S) = 13+8+18 = 39
Let A = Walk to school
n(A) = 13
𝑃( 𝐴) =
13
39
= 0.33