There are some pupils in the stadium.
310 of them are boys, of whom 10% of them do not wear hats.
47 of the girls do not wear hats. What is the percentage of the pupils in the stadium who do not wear hats?
| Boys |
Girls |
Total |
3x10 =
30 u |
7x10 =
70 u |
10x10 =
100 u |
| No hats |
Hats |
No hats |
Hats |
|
| 1x3 |
9x3 |
4x10 |
3x10 |
|
| 3 u |
27 u |
40 u |
30 u |
100 u |
10% =
10100=
110 The number of boys is the repeated identity. Make the number of boys the same. LCM of 3 and 10 is 30.
Number of pupils who do not wear hats
= 3 u + 40 u
= 43 u
Total number of pupils
= 3 u + 27 u + 40 u + 30 u
= 100 u
Percentage of the pupils in the stadium who do not wear hats
=
43100 x 100%
= 43%
Answer(s): 43%
