Fill in the blanks.
The ratio of adults to children is 1 : 5.
The ratio of girls to boys is 3 : 5.
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 |
1x8 = 8 u |
5x8 = 40 u |
|
Girls |
Boys |
8 |
3x5 |
5x5 |
8 u |
15 u |
25 u |
(a)
Change ratio into units.
Girls : Boys : Children
3 : 5 : 3 + 5
3 : 5 : 8
The number of children is the repeated identity.
LCM of 5 and 8 is 40.
Number of adults = 8 u
(b)
Number of girls = 15 u
(c)
Difference in the number of boys and girls
= 25 u - 15 u
= 10 u
(d)
Total number of people
= 8 u + 40 u
= 48 u
Answer(s): (a) 8; (b) 15; (c) 10; (d) 48