There are some students in the bird park.
310 of them are boys, of whom 50% of them do not wear glasses.
47 of the girls do not wear glasses. What is the percentage of the students in the bird park who do not wear glasses?
| Boys |
Girls |
Total |
3x2 =
6 u |
7x2 =
14 u |
10x2 =
20 u |
| No glasses |
Glasses |
No glasses |
Glasses |
|
| 1x3 |
1x3 |
4x2 |
3x2 |
|
| 3 u |
3 u |
8 u |
6 u |
20 u |
50% =
50100=
12 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 2 is 6.
Number of students who do not wear glasses
= 3 u + 8 u
= 11 u
Total number of students
= 3 u + 3 u + 8 u + 6 u
= 20 u
Percentage of the students in the bird park who do not wear glasses
=
1120 x 100%
= 55%
Answer(s): 55%
