There are some pupils in the theme park.
15 of them are girls, of whom 75% of them do not wear glasses.
14 of the boys do not wear glasses. What is the percentage of the pupils in the theme park who wear glasses?
Girls |
Boys |
Total |
1x4 = 4 u |
4x4 = 16 u |
5x4 = 20 u |
No glasses |
Glasses |
No glasses |
Glasses |
|
3x1 |
1x1 |
1x4 |
3x4 |
|
3 u |
1 u |
4 u |
12 u |
20 u |
75% =
75100=
34 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 4 is 4.
Number of pupils who wear glasses
= 1 u + 12 u
= 13 u
Total number of pupils
= 3 u + 1 u + 4 u + 12 u
= 20 u
Percentage of the pupils in the theme park who wear glasses
=
1320 x 100%
= 65%
Answer(s): 65%