Fill in the blanks.
The ratio of adults to children is 1 : 10.
The ratio of girls to boys is 1 : 7.
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 |
1x4 = 4 u |
10x4 = 40 u |
|
Girls |
Boys |
8 |
1x5 |
7x5 |
4 u |
5 u |
35 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 7 : 1 + 7
1 : 7 : 8
The number of children is the repeated identity.
LCM of 10 and 8 is 40.
Number of adults = 4 u
(b)
Number of girls = 5 u
(c)
Difference in the number of boys and girls
= 35 u - 5 u
= 30 u
(d)
Total number of people
= 4 u + 40 u
= 44 u
Answer(s): (a) 4; (b) 5; (c) 30; (d) 44