Fill in the blanks.
The ratio of adults to children is 3 : 2.
The ratio of boys to girls is 1 : 3.
Use LCM and find the following.
- Number of adults = _____ u
- Number of boys = _____ u
- Difference in the number of girls and boys = _____ u
- Total number of people = _____ u
Adults |
Children |
3x2 = 6 u |
2x2 = 4 u |
|
Boys |
Girls |
4 |
1x1 |
3x1 |
6 u |
1 u |
3 u |
(a)
Change ratio into units.
Boys : Girls : Children
1 : 3 : 1 + 3
1 : 3 : 4
The number of children is the repeated identity.
LCM of 2 and 4 is 4.
Number of adults = 6 u
(b)
Number of boys = 1 u
(c)
Difference in the number of girls and boys
= 3 u - 1 u
= 2 u
(d)
Total number of people
= 6 u + 4 u
= 10 u
Answer(s): (a) 6; (b) 1; (c) 2; (d) 10