Fill in the blanks.
The ratio of adults to children is 8 : 5.
The ratio of boys to girls is 1 : 2.
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 |
8x3 = 24 u |
5x3 = 15 u |
|
Boys |
Girls |
3 |
1x5 |
2x5 |
24 u |
5 u |
10 u |
(a)
Change ratio into units.
Boys : Girls : Children
1 : 2 : 1 + 2
1 : 2 : 3
The number of children is the repeated identity.
LCM of 5 and 3 is 15.
Number of adults = 24 u
(b)
Number of boys = 5 u
(c)
Difference in the number of girls and boys
= 10 u - 5 u
= 5 u
(d)
Total number of people
= 24 u + 15 u
= 39 u
Answer(s): (a) 24; (b) 5; (c) 5; (d) 39