Fill in the blanks.
The ratio of adults to children is 3 : 5.
The ratio of boys to girls is 1 : 9.
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 |
5x2 = 10 u |
|
Boys |
Girls |
10 |
1x1 |
9x1 |
6 u |
1 u |
9 u |
(a)
Change ratio into units.
Boys : Girls : Children
1 : 9 : 1 + 9
1 : 9 : 10
The number of children is the repeated identity.
LCM of 5 and 10 is 10.
Number of adults = 6 u
(b)
Number of boys = 1 u
(c)
Difference in the number of girls and boys
= 9 u - 1 u
= 8 u
(d)
Total number of people
= 6 u + 10 u
= 16 u
Answer(s): (a) 6; (b) 1; (c) 8; (d) 16