PSLE A caterer prepares fishballs for some people attending the birthday party. The ratio of the number of children to the number of adults attending is 2 : 15. Among the adults, the ratio of the number of men to the women is 11 : 4. A total of 105 fishballs are prepared so that each child gets 3 fishballs and each adult gets 1.
- What fraction of the people attending the party are women?
- How many adults are attending the party?
|
Children |
Adults |
Total |
Comparison between the number of children and adults |
2
|
15
|
17
|
|
|
Men |
Women |
|
Comparison between the number of children and adults |
|
11
|
4
|
|
Number |
2 u |
11 u |
4 u |
17 u |
Value |
3 |
1 |
1 |
|
Total value |
6 u |
11 u |
4 u |
21 u |
(a)
Fraction of the people that are adults =
1517 Fraction of the adults that are women =
415 Fraction of the people that are women
=
1517 x
415 =
417 (b)
Total number of fishballs
= (2 u x 3) + (15 u x 1)
= 6 u + 15 u
= 21 u
21 u = 105
1 u = 105 ÷ 21 = 5
Number of adults
= 11 u + 4 u
= 15 u
= 15 x 5
= 75
Answer(s): (a)
417; (b) 75