Fill in the blanks.
The ratio of adults to children is 9 : 5.
The ratio of girls to boys is 8 : 9.
Use LCM and find the following.
- Number of adults = _____ u
- Number of girls = _____ u
- Difference in the number of boys and girls = _____ u
- Total number of people = _____ u
Adults |
Children |
9x17 = 153 u |
5x17 = 85 u |
|
Girls |
Boys |
17 |
8x5 |
9x5 |
153 u |
40 u |
45 u |
(a)
Change ratio into units.
Girls : Boys : Children
8 : 9 : 8 + 9
8 : 9 : 17
The number of children is the repeated identity.
LCM of 5 and 17 is 85.
Number of adults = 153 u
(b)
Number of girls = 40 u
(c)
Difference in the number of boys and girls
= 45 u - 40 u
= 5 u
(d)
Total number of people
= 153 u + 85 u
= 238 u
Answer(s): (a) 153; (b) 40; (c) 5; (d) 238