In a school, 0.75 of the boys and 0.1 of the girls take part in interviews. There is an equal number of girls and boys who do not take part in interviews. If 360 children do not take part in interviews, how many more children take part in interviews than those who do not take part in interviews?
Boys |
Girls |
Take part |
Do not take part |
Take part |
Do not take part |
3x9 |
1x9 |
1 |
9 |
|
1x9 |
|
1x9 |
27 u |
9 u |
1 u |
9 u |
0.75 =
34 Boys that take part : Boys that do not take part = 3 : 1
0.1 =
110 Girls that take part : Girls that do not take part = 1 : 9
The number of girls who do not take part is repeated. Make the number of girls who do not take part the same. LCM of 1 and 9 is 9.
Number of children who do not take part in interviews
= 9 u + 9 u
= 18 u
18 u = 360
1 u = 360 ÷ 18 = 20
Number of children who take part in interviews
= 27 u + 1 u
= 28 u
Number of more children who take part in interviews than those who do not take part in interviews
= 28 u - 18 u
= 10 u
= 10 x 20
= 200
Answer(s): 200