Fill in the blanks.
The ratio of adults to children is 1 : 2.
The ratio of girls to boys is 6 : 7.
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 |
1x13 = 13 u |
2x13 = 26 u |
|
Girls |
Boys |
13 |
6x2 |
7x2 |
13 u |
12 u |
14 u |
(a)
Change ratio into units.
Girls : Boys : Children
6 : 7 : 6 + 7
6 : 7 : 13
The number of children is the repeated identity.
LCM of 2 and 13 is 26.
Number of adults = 13 u
(b)
Number of girls = 12 u
(c)
Difference in the number of boys and girls
= 14 u - 12 u
= 2 u
(d)
Total number of people
= 13 u + 26 u
= 39 u
Answer(s): (a) 13; (b) 12; (c) 2; (d) 39