Fill in the blanks.
The ratio of adults to children is 4 : 3.
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 |
4x1 = 4 u |
3x1 = 3 u |
|
Girls |
Boys |
3 |
1x1 |
2x1 |
4 u |
1 u |
2 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 3 and 3 is 3.
Number of adults = 4 u
(b)
Number of girls = 1 u
(c)
Difference in the number of boys and girls
= 2 u - 1 u
= 1 u
(d)
Total number of people
= 4 u + 3 u
= 7 u
Answer(s): (a) 4; (b) 1; (c) 1; (d) 7