PSLE A caterer prepares fish fingers for some people attending the birthday party. The ratio of the number of children to the number of adults attending is 1 : 4. Among the adults, the ratio of the number of women to the men is 1 : 3. A total of 70 fish fingers are prepared so that each child gets 3 fish fingers and each adult gets 1.
- What fraction of the people attending the party are men?
- How many adults are attending the party?
|
Children |
Adults |
Total |
Comparison between the number of children and adults |
1
|
4
|
5
|
|
|
Women |
Men |
|
Comparison between the number of children and adults |
|
1
|
3
|
|
Number |
1 u |
1 u |
3 u |
5 u |
Value |
3 |
1 |
1 |
|
Total value |
3 u |
1 u |
3 u |
7 u |
(a)
Fraction of the people that are adults =
45 Fraction of the adults that are men =
34 Fraction of the people that are men
=
45 x
34 =
35 (b)
Total number of fish fingers
= (1 u x 3) + (4 u x 1)
= 3 u + 4 u
= 7 u
7 u = 70
1 u = 70 ÷ 7 = 10
Number of adults
= 1 u + 3 u
= 4 u
= 4 x 10
= 40
Answer(s): (a)
35; (b) 40