Fill in the blanks.
The ratio of adults to children is 4 : 3.
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 |
4x4 = 16 u |
3x4 = 12 u |
|
Girls |
Boys |
4 |
1x3 |
3x3 |
16 u |
3 u |
9 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 3 and 4 is 12.
Number of adults = 16 u
(b)
Number of girls = 3 u
(c)
Difference in the number of boys and girls
= 9 u - 3 u
= 6 u
(d)
Total number of people
= 16 u + 12 u
= 28 u
Answer(s): (a) 16; (b) 3; (c) 6; (d) 28