Fill in the blanks.
The ratio of adults to children is 1 : 2.
The ratio of girls to boys is 1 : 2.
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 |
1x3 = 3 u |
2x3 = 6 u |
|
Girls |
Boys |
3 |
1x2 |
2x2 |
3 u |
2 u |
4 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 2 : 1 + 2
1 : 2 : 3
The number of children is the repeated identity.
LCM of 2 and 3 is 6.
Number of adults = 3 u
(b)
Number of girls = 2 u
(c)
Difference in the number of boys and girls
= 4 u - 2 u
= 2 u
(d)
Total number of people
= 3 u + 6 u
= 9 u
Answer(s): (a) 3; (b) 2; (c) 2; (d) 9