There are some pupils in the zoo.
35 of them are girls, of whom 60% of them do not wear watches.
12 of the boys do not wear watches. What is the percentage of the pupils in the zoo who do not wear watches?
Girls |
Boys |
Total |
3x5 = 15 u |
2x5 = 10 u |
5x5 = 25 u |
No watches |
Watches |
No watches |
Watches |
|
3x3 |
2x3 |
1x5 |
1x5 |
|
9 u |
6 u |
5 u |
5 u |
25 u |
60% =
60100=
35 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 5 is 15.
Number of pupils who do not wear watches
= 9 u + 5 u
= 14 u
Total number of pupils
= 9 u + 6 u + 5 u + 5 u
= 25 u
Percentage of the pupils in the zoo who do not wear watches
=
1425 x 100%
= 56%
Answer(s): 56%