Fill in the blanks.
The ratio of adults to children is 3 : 2.
The ratio of girls to boys is 3 : 10.
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 |
3x13 = 39 u |
2x13 = 26 u |
|
Girls |
Boys |
13 |
3x2 |
10x2 |
39 u |
6 u |
20 u |
(a)
Change ratio into units.
Girls : Boys : Children
3 : 10 : 3 + 10
3 : 10 : 13
The number of children is the repeated identity.
LCM of 2 and 13 is 26.
Number of adults = 39 u
(b)
Number of girls = 6 u
(c)
Difference in the number of boys and girls
= 20 u - 6 u
= 14 u
(d)
Total number of people
= 39 u + 26 u
= 65 u
Answer(s): (a) 39; (b) 6; (c) 14; (d) 65