Four minutes ago, 70% of the students in a parade square were girls. 41 more students entered the parade square. As a result, the number of girls increased by 20% and the number of boys increased by 70%. How many students are in the parade square now?
| |
Girls |
Boys |
Total |
| Before |
10 u |
3 u |
13 u |
| Change |
+ 2 u |
+ 2.1 u |
+ 4.1 u |
| After |
12 u |
5.1 u |
17.1 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
= 70% x 3 u
=
70100 x 3 u
= 2.1 u
Total number of more students who entered the parade square
= 2 u + 2.1 u
= 4.1 u
4.1 u = 41
1 u = 41 ÷ 4.1 = 10
Number of students in the parade square now
= 12 u + 5.1 u
= 17.1 u
= 17.1 x 10
= 171
Answer(s): 171
