Fill in the blanks.
The ratio of adults to children is 7 : 8.
The ratio of girls to boys is 3 : 10.
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 |
7x13 = 91 u |
8x13 = 104 u |
|
Girls |
Boys |
13 |
3x8 |
10x8 |
91 u |
24 u |
80 u |
(a)
Change ratio into units.
Girls : Boys : Children
3 : 10 : 3 + 10
3 : 10 : 13
The number of children is the repeated identity.
LCM of 8 and 13 is 104.
Number of adults = 91 u
(b)
Number of girls = 24 u
(c)
Difference in the number of boys and girls
= 80 u - 24 u
= 56 u
(d)
Total number of people
= 91 u + 104 u
= 195 u
Answer(s): (a) 91; (b) 24; (c) 56; (d) 195