Fill in the blanks.
The ratio of adults to children is 1 : 1.
The ratio of boys to girls is 9 : 10.
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 |
1x19 = 19 u |
1x19 = 19 u |
|
Boys |
Girls |
19 |
9x1 |
10x1 |
19 u |
9 u |
10 u |
(a)
Change ratio into units.
Boys : Girls : Children
9 : 10 : 9 + 10
9 : 10 : 19
The number of children is the repeated identity.
LCM of 1 and 19 is 19.
Number of adults = 19 u
(b)
Number of boys = 9 u
(c)
Difference in the number of girls and boys
= 10 u - 9 u
= 1 u
(d)
Total number of people
= 19 u + 19 u
= 38 u
Answer(s): (a) 19; (b) 9; (c) 1; (d) 38