In a school, 0.9 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 108 students do not take part in interviews, how many more students 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 |
9x9 |
1x9 |
1 |
9 |
|
1x9 |
|
1x9 |
81 u |
9 u |
1 u |
9 u |
0.9 =
910 Boys that take part : Boys that do not take part = 9 : 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 students who do not take part in interviews
= 9 u + 9 u
= 18 u
18 u = 108
1 u = 108 ÷ 18 = 6
Number of students who take part in interviews
= 81 u + 1 u
= 82 u
Number of more students who take part in interviews than those who do not take part in interviews
= 82 u - 18 u
= 64 u
= 64 x 6
= 384
Answer(s): 384