Fill in the blanks.
The ratio of adults to children is 9 : 2.
The ratio of boys to girls is 2 : 3.
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 |
9x5 = 45 u |
2x5 = 10 u |
|
Boys |
Girls |
5 |
2x2 |
3x2 |
45 u |
4 u |
6 u |
(a)
Change ratio into units.
Boys : Girls : Children
2 : 3 : 2 + 3
2 : 3 : 5
The number of children is the repeated identity.
LCM of 2 and 5 is 10.
Number of adults = 45 u
(b)
Number of boys = 4 u
(c)
Difference in the number of girls and boys
= 6 u - 4 u
= 2 u
(d)
Total number of people
= 45 u + 10 u
= 55 u
Answer(s): (a) 45; (b) 4; (c) 2; (d) 55