Fill in the blanks.
Number of girls at first is 10% of the children.
Number of girls is then increased to 60%.
- Number of girls at first = _____ u
- Number of girls in the end = _____ u
- Increase in the number of girls = _____ u
- Number of children in the end = _____ u
|
Girls |
Boys |
Before |
1 x 2 = 2 u |
9 x 2 = 18 u |
Change |
+ ? |
No change |
After |
3 x 9 = 27 u |
2 x 9 = 18 u |
(a)
Change percentage into units.
10% =
10100 =
110 60% =
60100 =
35 Fraction of the children who are boys at first
= 1 -
110 =
910 Fraction of the children who are boys in the end
= 1 -
35=
25 Number of boys at first and in the end remains the same.
The number of boys is the unchanged quantity.
LCM of 9 and 2 = 18
Number of girls at first = 2 u
(b)
Number of girls in the end = 27 u
(c)
Increase in the number of girls
= 27 u - 2 u
= 25 u
(d)
Number of children in the end
= 27 u + 18 u
= 45 u
Answer(s): (a) 2; (b) 27; (c) 25; (d) 45