Fill in the blanks.
The ratio of adults to children is 5 : 12.
The ratio of boys to girls is 3 : 5.
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 |
5x2 = 10 u |
12x2 = 24 u |
|
Boys |
Girls |
8 |
3x3 |
5x3 |
10 u |
9 u |
15 u |
(a)
Change ratio into units.
Boys : Girls : Children
3 : 5 : 3 + 5
3 : 5 : 8
The number of children is the repeated identity.
LCM of 12 and 8 is 24.
Number of adults = 10 u
(b)
Number of boys = 9 u
(c)
Difference in the number of girls and boys
= 15 u - 9 u
= 6 u
(d)
Total number of people
= 10 u + 24 u
= 34 u
Answer(s): (a) 10; (b) 9; (c) 6; (d) 34