Fill in the blanks.
The ratio of adults to children is 1 : 2.
The ratio of girls to boys is 1 : 6.
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 |
1x7 = 7 u |
2x7 = 14 u |
|
Girls |
Boys |
7 |
1x2 |
6x2 |
7 u |
2 u |
12 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 6 : 1 + 6
1 : 6 : 7
The number of children is the repeated identity.
LCM of 2 and 7 is 14.
Number of adults = 7 u
(b)
Number of girls = 2 u
(c)
Difference in the number of boys and girls
= 12 u - 2 u
= 10 u
(d)
Total number of people
= 7 u + 14 u
= 21 u
Answer(s): (a) 7; (b) 2; (c) 10; (d) 21