PSLE In a school, 45% of the members in Computer Club and 60% of the members in Art Club are girls. Both clubs have the same number of boys. The Computer Club has 30 less girls than the Art Club. How many members are there in Art Club?
|
Computer Club |
Art Club |
Types |
Girls |
Boys |
Girls |
Boys |
Comparing the girls and the boys in each club |
9x2 |
11x2 |
3x11 |
2x11 |
Comparing the boys in 2 clubs |
|
1 |
|
1 |
|
18 u |
22 u |
33 u |
22 u |
45% =
45100 =
920 Fraction of the members in Computer Club that are boys
= 1 -
920 =
1120 60% =
60100 =
35 Fraction of the members in Art club that are boys
= 1 -
35 =
25 The number of boys in both clubs is the same. Make the numerators the same. LCM of 11 and 2 is 22.
11x220x2 of the members in Computer Club =
2x115x11 of the members in Art Club
2240of the members in Computer Club =
2255 of the members in Art Club
Number of less girls in Computer Club than Art Club
= 33 u - 18 u
= 15 u
15 u = 30
1 u = 30 ÷ 15 = 2
Number of members in Art Club
= 55 u
= 55 x 2
= 110
Answer(s): 110