Fill in the blanks.
The ratio of adults to children is 6 : 7.
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 |
6x8 = 48 u |
7x8 = 56 u |
|
Girls |
Boys |
8 |
3x7 |
5x7 |
48 u |
21 u |
35 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 7 and 8 is 56.
Number of adults = 48 u
(b)
Number of girls = 21 u
(c)
Difference in the number of boys and girls
= 35 u - 21 u
= 14 u
(d)
Total number of people
= 48 u + 56 u
= 104 u
Answer(s): (a) 48; (b) 21; (c) 14; (d) 104