Fill in the blanks.
The ratio of adults to children is 1 : 2.
The ratio of girls to boys is 1 : 3.
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 |
1x2 = 2 u |
2x2 = 4 u |
|
Girls |
Boys |
4 |
1x1 |
3x1 |
2 u |
1 u |
3 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 3 : 1 + 3
1 : 3 : 4
The number of children is the repeated identity.
LCM of 2 and 4 is 4.
Number of adults = 2 u
(b)
Number of girls = 1 u
(c)
Difference in the number of boys and girls
= 3 u - 1 u
= 2 u
(d)
Total number of people
= 2 u + 4 u
= 6 u
Answer(s): (a) 2; (b) 1; (c) 2; (d) 6