Fill in the blanks.
The ratio of adults to children is 3 : 5.
The ratio of girls to boys is 1 : 8.
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 |
3x9 = 27 u |
5x9 = 45 u |
|
Girls |
Boys |
9 |
1x5 |
8x5 |
27 u |
5 u |
40 u |
(a)
Change ratio into units.
Girls : Boys : Children
1 : 8 : 1 + 8
1 : 8 : 9
The number of children is the repeated identity.
LCM of 5 and 9 is 45.
Number of adults = 27 u
(b)
Number of girls = 5 u
(c)
Difference in the number of boys and girls
= 40 u - 5 u
= 35 u
(d)
Total number of people
= 27 u + 45 u
= 72 u
Answer(s): (a) 27; (b) 5; (c) 35; (d) 72