Fill in the blanks.
The ratio of adults to children is 7 : 6.
The ratio of girls to boys is 7 : 8.
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 |
7x5 = 35 u |
6x5 = 30 u |
|
Girls |
Boys |
15 |
7x2 |
8x2 |
35 u |
14 u |
16 u |
(a)
Change ratio into units.
Girls : Boys : Children
7 : 8 : 7 + 8
7 : 8 : 15
The number of children is the repeated identity.
LCM of 6 and 15 is 30.
Number of adults = 35 u
(b)
Number of girls = 14 u
(c)
Difference in the number of boys and girls
= 16 u - 14 u
= 2 u
(d)
Total number of people
= 35 u + 30 u
= 65 u
Answer(s): (a) 35; (b) 14; (c) 2; (d) 65