Eleven minutes ago, 70% of the pupils in a basketball court were boys. 27 more pupils entered the basketball court. As a result, the number of boys increased by 30% and the number of girls increased by 80%. How many pupils are in the basketball court now?
|
Boys |
Girls |
Total |
Before |
10 u |
3 u |
13 u |
Change |
+ 3 u |
+ 2.4 u |
+ 5.4 u |
After |
13 u |
5.4 u |
18.4 u |
70% =
70100 =
710Number of more boys who entered the basketball court
= 30% x 10 u
=
30100 x 10 u
= 3 u
Number of more girls who entered the basketball court
= 80% x 3 u
=
80100 x 3 u
= 2.4 u
Total number of more pupils who entered the basketball court
= 3 u + 2.4 u
= 5.4 u
5.4 u = 27
1 u = 27 ÷ 5.4 = 5
Number of pupils in the basketball court now
= 13 u + 5.4 u
= 18.4 u
= 18.4 x 5
= 92
Answer(s): 92