At a school, there were 60 boys from Club Q and 40% less boys from Club R. Some boys joined Club R and the ratio of the number of boys from Club Q to the number of boys from Club R became 6 : 5. How many boys joined Club R?
| |
Club Q |
Club R |
| Before |
60 |
36 |
| Change |
|
+ ? |
| After |
6 u |
5 u |
Number of boys from Club R at first in percent
= 100% - 40%
= 60%
Number of boys from Club R at first
= 60% x 60
=
60100 x 60
= 36
Number of boys in Club Q remains unchanged.
6 u = 60
1 u = 60 ÷ 6 = 10
Number of boys from Club R in the end
= 5 u
= 5 x 10
= 50
Number of boys joined Club R
= 50 - 36
= 14
Answer(s): 14
