Fill in the blanks.
The ratio of the number of girls to the number of boys in Class A is 5 : 2.
The ratio of the number of girls to the number of boys in Class B is 3 : 10.
The number of girls is the same.
- Difference in the number of children in Class A and Class B = _____ u
- Difference in the number of boys in Class A and Class B = _____ u
- Total number of girls = _____ u
- Total number of boys = _____ u
(a)
Class A |
Class B |
Girls |
Boys |
Girls |
Boys |
5 x 3 |
2 x 3 |
3 x 5 |
10 x 5 |
15 u |
6 u |
15 u |
50 u |
Change ratio into units.
The number of girls in Class A and Class B is the same.
LCM of 5 and 3 = 15
Number of children in Class A
= 15 u + 6 u
= 21 u
Number of children in Class B
= 15 u + 50 u
= 65 u
Difference in the number of children in Class A and Class B
= 65 u - 21 u
= 44 u
(b)
Number of boys in Class A = 6 u
Number of boys in Class B = 50 u
Difference in the number of boys in Class A and Class B
= 50 u - 6 u
= 44 u
(c)
Number of girls in Class A = 15 uNumber of girls in Class B = 15 u Total number of girls = 15 u + 15 u= 30 u (d)
Total number of boys in Class A and Class B
= 50 u + 6 u
= 56 u
Answer(s)
: (a) 44; (b) 44; (c) 30; (d) 56