In a school, 0.8 of the boys and 0.7 of the girls take part in sports. There is an equal number of girls and boys who do not take part in sports. If 152 children take part in sports, how many less children do not take part in sports than those who take part in sports?
Boys |
Girls |
Take part |
Do not take part |
Take part |
Do not take part |
4x3 |
1x3 |
7 |
3 |
|
1x3 |
|
1x3 |
12 u |
3 u |
7 u |
3 u |
0.8 =
45 Boys that take part : Boys that do not take part = 4 : 1
0.7 =
710 Girls that take part : Girls that do not take part = 7 : 3
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 3 is 3.
Number of children who take part in sports
= 12 u + 7 u
= 19 u
19 u = 152
1 u = 152 ÷ 19 = 8
Number of children who do not take part in sports
= 3 u + 3 u
= 6 u
Number of less children who do not take part in sports than those who take part in sports
= 19 u - 6 u
= 13 u
= 13 x 8
= 104
Answer(s): 104