Fill in the blanks.
The ratio of the number of women to the number of men in Class A is 2 : 1.
The ratio of the number of women to the number of men in Class B is 7 : 9.
The number of women is the same.
- Difference in the number of children in Class A and Class B = _____ u
- Difference in the number of men in Class A and Class B = _____ u
- Total number of women = _____ u
- Total number of men = _____ u
(a)
Class A |
Class B |
Women |
Men |
Women |
Men |
2 x 7 |
1 x 7 |
7 x 2 |
9 x 2 |
14 u |
7 u |
14 u |
18 u |
Change ratio into units.
The number of women in Class A and Class B is the same.
LCM of 2 and 7 = 14
Number of students in Class A
= 14 u + 7 u
= 21 u
Number of students in Class B
= 14 u + 18 u
= 32 u
Difference in the number of students in Class A and Class B
= 32 u - 21 u
= 11 u
(b)
Number of men in Class A = 7 u
Number of men in Class B = 18 u
Difference in the number of men in Class A and Class B
= 18 u - 7 u
= 11 u
(c)
Number of women in Class A = 14 uNumber of women in Class B = 14 u Total number of women = 14 u + 14 u= 28 u (d)
Total number of men in Class A and Class B
= 18 u + 7 u
= 25 u
Answer(s)
: (a) 11; (b) 11; (c) 28; (d) 25