There are some students in the school hall.
25 of them are boys, of whom 25% of them do not wear caps.
13 of the girls do not wear caps. What is the percentage of the students in the school hall who do not wear caps?
Boys |
Girls |
Total |
2x2 = 4 u |
3x2 = 6 u |
5x2 = 10 u |
No caps |
Caps |
No caps |
Caps |
|
1x1 |
3x1 |
1x2 |
2x2 |
|
1 u |
3 u |
2 u |
4 u |
10 u |
25% =
25100=
14 The number of boys is the repeated identity. Make the number of boys the same. LCM of 2 and 4 is 4.
Number of students who do not wear caps
= 1 u + 2 u
= 3 u
Total number of students
= 1 u + 3 u + 2 u + 4 u
= 10 u
Percentage of the students in the school hall who do not wear caps
=
310 x 100%
= 30%
Answer(s): 30%