There are some pupils in the stadium.
25 of them are boys, of whom 75% of them do not wear hats.
13 of the girls do not wear hats. What is the percentage of the pupils in the stadium who wear hats?
| Boys |
Girls |
Total |
2x2 =
4 u |
3x2 =
6 u |
5x2 =
10 u |
| No hats |
Hats |
No hats |
Hats |
|
| 3x1 |
1x1 |
1x2 |
2x2 |
|
| 3 u |
1 u |
2 u |
4 u |
10 u |
75% =
75100=
34 The number of boys is the repeated identity. Make the number of boys the same. LCM of 2 and 4 is 4.
Number of pupils who wear hats
= 1 u + 4 u
= 5 u
Total number of pupils
= 3 u + 1 u + 2 u + 4 u
= 10 u
Percentage of the pupils in the stadium who wear hats
=
510 x 100%
= 50%
Answer(s): 50%
