Six minutes ago, 70% of the pupils in a parade square were girls. 44 more pupils entered the parade square. As a result, the number of girls increased by 20% and the number of boys increased by 80%. How many pupils are in the parade square now?
|
Girls |
Boys |
Total |
Before |
10 u |
3 u |
13 u |
Change |
+ 2 u |
+ 2.4 u |
+ 4.4 u |
After |
12 u |
5.4 u |
17.4 u |
70% =
70100 =
710Number of more girls who entered the parade square
= 20% x 10 u
=
20100 x 10 u
= 2 u
Number of more boys who entered the parade square
= 80% x 3 u
=
80100 x 3 u
= 2.4 u
Total number of more pupils who entered the parade square
= 2 u + 2.4 u
= 4.4 u
4.4 u = 44
1 u = 44 ÷ 4.4 = 10
Number of pupils in the parade square now
= 12 u + 5.4 u
= 17.4 u
= 17.4 x 10
= 174
Answer(s): 174