PSLE In a school, 60% of the members in Chess Club and 75% of the members in Literary Club are girls. Both clubs have the same number of boys. The Chess Club has 30 less girls than the Literary Club. How many members are there in Literary Club?
|
Chess Club |
Literary Club |
Types |
Girls |
Boys |
Girls |
Boys |
Comparing the girls and the boys in each club |
3x1 |
2x1 |
3x2 |
1x2 |
Comparing the boys in 2 clubs |
|
1 |
|
1 |
|
3 u |
2 u |
6 u |
2 u |
60% =
60100 =
35 Fraction of the members in Chess Club that are boys
= 1 -
35 =
25 75% =
75100 =
34 Fraction of the members in Literary club that are boys
= 1 -
34 =
14 The number of boys in both clubs is the same. Make the numerators the same. LCM of 2 and 1 is 2.
2x15x1 of the members in Chess Club =
1x24x2 of the members in Literary Club
25of the members in Chess Club =
28 of the members in Literary Club
Number of less girls in Chess Club than Literary Club
= 6 u - 3 u
= 3 u
3 u = 30
1 u = 30 ÷ 3 = 10
Number of members in Literary Club
= 8 u
= 8 x 10
= 80
Answer(s): 80