Five minutes ago, 60% of the pupils in a parade square were girls. 32 more pupils entered the parade square. As a result, the number of girls increased by 40% and the number of boys increased by 60%. How many pupils are in the parade square now?
| |
Girls |
Boys |
Total |
| Before |
5 u |
2 u |
7 u |
| Change |
+ 2 u |
+ 1.2 u |
+ 3.2 u |
| After |
7 u |
3.2 u |
10.2 u |
60% =
60100 =
35Number of more girls who entered the parade square
= 40% x 5 u
=
40100 x 5 u
= 2 u
Number of more boys who entered the parade square
= 60% x 2 u
=
60100 x 2 u
= 1.2 u
Total number of more pupils who entered the parade square
= 2 u + 1.2 u
= 3.2 u
3.2 u = 32
1 u = 32 ÷ 3.2 = 10
Number of pupils in the parade square now
= 7 u + 3.2 u
= 10.2 u
= 10.2 x 10
= 102
Answer(s): 102
