There are some students in the fun fair.
310 of them are girls, of whom 30% of them do not wear spectacles.
17 of the boys do not wear spectacles. What is the percentage of the students in the fun fair who do not wear spectacles?
Girls |
Boys |
Total |
3x10 = 30 u |
7x10 = 70 u |
10x10 = 100 u |
No spectacles |
Spectacles |
No spectacles |
Spectacles |
|
3x3 |
7x3 |
1x10 |
6x10 |
|
9 u |
21 u |
10 u |
60 u |
100 u |
30% =
30100=
310 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 10 is 30.
Number of students who do not wear spectacles
= 9 u + 10 u
= 19 u
Total number of students
= 9 u + 21 u + 10 u + 60 u
= 100 u
Percentage of the students in the fun fair who do not wear spectacles
=
19100 x 100%
= 19%
Answer(s): 19%