Fill in the blanks.
The ratio of adults to children is 5 : 8.
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 |
5x3 = 15 u |
8x3 = 24 u |
|
Girls |
Boys |
3 |
1x8 |
2x8 |
15 u |
8 u |
16 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 8 and 3 is 24.
Number of adults = 15 u
(b)
Number of girls = 8 u
(c)
Difference in the number of boys and girls
= 16 u - 8 u
= 8 u
(d)
Total number of people
= 15 u + 24 u
= 39 u
Answer(s): (a) 15; (b) 8; (c) 8; (d) 39