Thirteen minutes ago, 60% of the students in a parade square were boys. 56 more students entered the parade square. As a result, the number of boys increased by 20% and the number of girls increased by 90%. How many students are in the parade square now?
| |
Boys |
Girls |
Total |
| Before |
5 u |
2 u |
7 u |
| Change |
+ 1 u |
+ 1.8 u |
+ 2.8 u |
| After |
6 u |
3.8 u |
9.8 u |
60% =
60100 =
35Number of more boys who entered the parade square
= 20% x 5 u
=
20100 x 5 u
= 1 u
Number of more girls who entered the parade square
= 90% x 2 u
=
90100 x 2 u
= 1.8 u
Total number of more students who entered the parade square
= 1 u + 1.8 u
= 2.8 u
2.8 u = 56
1 u = 56 ÷ 2.8 = 20
Number of students in the parade square now
= 6 u + 3.8 u
= 9.8 u
= 9.8 x 20
= 196
Answer(s): 196
