Fill in the blanks.
The ratio of adults to children is 2 : 1.
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 |
2x8 = 16 u |
1x8 = 8 u |
|
Boys |
Girls |
8 |
3x1 |
5x1 |
16 u |
3 u |
5 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 1 and 8 is 8.
Number of adults = 16 u
(b)
Number of boys = 3 u
(c)
Difference in the number of girls and boys
= 5 u - 3 u
= 2 u
(d)
Total number of people
= 16 u + 8 u
= 24 u
Answer(s): (a) 16; (b) 3; (c) 2; (d) 24