PSLE A caterer prepares chicken wings for some people attending the wedding party. The ratio of the number of adults to the number of children attending is 1 : 2. Among the children, the ratio of the number of girls to the boys is 1 : 1. A total of 55 chicken wings are prepared so that each adult gets 3 chicken wings and each child gets 1.
- What fraction of the people attending the party are boys?
- How many children are attending the party?
|
Adults |
Children |
Total |
Comparison between the number of adults and children |
1
|
2
|
3
|
|
|
Girls |
Boys |
|
Comparison between the number of adults and children |
|
1
|
1
|
|
Number |
1 u |
1 u |
1 u |
3 u |
Value |
3 |
1 |
1 |
|
Total value |
3 u |
1 u |
1 u |
5 u |
(a)
Fraction of the people that are children =
23 Fraction of the children that are boys =
12 Fraction of the people that are boys
=
23 x
12 =
13 (b)
Total number of chicken wings
= (1 u x 3) + (2 u x 1)
= 3 u + 2 u
= 5 u
5 u = 55
1 u = 55 ÷ 5 = 11
Number of children
= 1 u + 1 u
= 2 u
= 2 x 11
= 22
Answer(s): (a)
13; (b) 22