Fill in the blanks.
The ratio of adults to children is 1 : 1.
The ratio of boys to girls is 2 : 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 |
1x5 = 5 u |
1x5 = 5 u |
|
Boys |
Girls |
5 |
2x1 |
3x1 |
5 u |
2 u |
3 u |
(a)
Change ratio into units.
Boys : Girls : Children
2 : 3 : 2 + 3
2 : 3 : 5
The number of children is the repeated identity.
LCM of 1 and 5 is 5.
Number of adults = 5 u
(b)
Number of boys = 2 u
(c)
Difference in the number of girls and boys
= 3 u - 2 u
= 1 u
(d)
Total number of people
= 5 u + 5 u
= 10 u
Answer(s): (a) 5; (b) 2; (c) 1; (d) 10