Fill in the blanks.
The ratio of adults to children is 1 : 1.
The ratio of girls to boys is 4 : 11.
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 |
1x15 = 15 u |
1x15 = 15 u |
|
Girls |
Boys |
15 |
4x1 |
11x1 |
15 u |
4 u |
11 u |
(a)
Change ratio into units.
Girls : Boys : Children
4 : 11 : 4 + 11
4 : 11 : 15
The number of children is the repeated identity.
LCM of 1 and 15 is 15.
Number of adults = 15 u
(b)
Number of girls = 4 u
(c)
Difference in the number of boys and girls
= 11 u - 4 u
= 7 u
(d)
Total number of people
= 15 u + 15 u
= 30 u
Answer(s): (a) 15; (b) 4; (c) 7; (d) 30