Sixteen minutes ago, 80% of the students in a canteen were girls. 32 more students entered the canteen. As a result, the number of girls increased by 20% and the number of boys increased by 60%. How many students are in the canteen now?
| |
Girls |
Boys |
Total |
| Before |
5 u |
1 u |
6 u |
| Change |
+ 1 u |
+ 0.6 u |
+ 1.6 u |
| After |
6 u |
1.6 u |
7.6 u |
80% =
80100 =
45Number of more girls who entered the canteen
= 20% x 5 u
=
20100 x 5 u
= 1 u
Number of more boys who entered the canteen
= 60% x 1 u
=
60100 x 1 u
= 0.6 u
Total number of more students who entered the canteen
= 1 u + 0.6 u
= 1.6 u
1.6 u = 32
1 u = 32 ÷ 1.6 = 20
Number of students in the canteen now
= 6 u + 1.6 u
= 7.6 u
= 7.6 x 20
= 152
Answer(s): 152
