Posted by Javier on Tuesday, November 6, 2012 at 8:48am.
There were 40 members in a hockey club. 3/8 of them were girls. When more girls joined the club, the percentage of the number of girls increased to 75%. How many more girls had joined the club?
Some teachers attended a workshop. They were divided into Group X and Y. The ratio of the number of teachers in Group X to the number of teachers in Group Y was 2:3. All the teachers in Group X were women. The ratio of the number of women in Group Y to the number of men in Group Y was 2:7. What fraction of the teachers who attended the workshop were men?

Maths  Steve, Tuesday, November 6, 2012 at 11:15am
3/8 of 40 = 15 girls
(15+x)/(40+x) = 3/4, so x = 60
check: 75/100 = 3/4

men fraction = (7/9 y)/(x+y)
but, x/y = 2/3, so x=2y/3
so, men fraction = (7y/9)/(2y/3 + y) = (7y/9)/(5y/3) = 7/15
Answer This Question
Related Questions
 math  This table shows the numbers of students in different classes that are in...
 Math  40 students are in the science club. 45% are girls. New girls enter the ...
 Math  In middle school computer club, 3/8 of the members are girls. Of the ...
 algebra2  in the chess club, the ratio of boys to girls is 6:5.there are three ...
 math  The drama club has 41 members. There are 9 more girls than boys. How many...
 Grade 6, percentage  At the beginning of the year,40% of the pupils in the art ...
 math  There were 20% more boys than girls in a swimming club. After 50 girls ...
 math  There were 20% more boys than girls in a swimming club. After 50 girls ...
 math  ok this is in my practice book. there are 33 students in the chess club. ...
 Math  The ratio of boys to girls in the checkers club at one school is 2:3. the...
More Related Questions