There are some students in the school hall.
110 of them are girls, of whom 10% of them do not wear spectacles.
19 of the boys do not wear spectacles. What is the percentage of the students in the school hall who do not wear spectacles?
| Girls |
Boys |
Total |
1x10 =
10 u |
9x10 =
90 u |
10x10 =
100 u |
| No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
| 1x1 |
9x1 |
1x10 |
8x10 |
|
| 1 u |
9 u |
10 u |
80 u |
100 u |
10% =
10100=
110 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 10 is 10.
Number of students who do not wear spectacles
= 1 u + 10 u
= 11 u
Total number of students
= 1 u + 9 u + 10 u + 80 u
= 100 u
Percentage of the students in the school hall who do not wear spectacles
=
11100 x 100%
= 11%
Answer(s): 11%
