Fill in the blanks.
The ratio of adults to children is 1 : 2.
The ratio of girls to boys is 1 : 4.
Use LCM and find the following.
- Number of adults = _____ u
- Number of girls = _____ u
- Difference in the number of boys and girls = _____ u
- Total number of people = _____ u
Adults |
Children |
1x5 = 5 u |
2x5 = 10 u |
|
Girls |
Boys |
5 |
1x2 |
4x2 |
5 u |
2 u |
8 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 4 : 1 + 4
1 : 4 : 5
The number of children is the repeated identity.
LCM of 2 and 5 is 10.
Number of adults = 5 u
(b)
Number of girls = 2 u
(c)
Difference in the number of boys and girls
= 8 u - 2 u
= 6 u
(d)
Total number of people
= 5 u + 10 u
= 15 u
Answer(s): (a) 5; (b) 2; (c) 6; (d) 15