In one Chinese class of 96 students, 0.1 of the girls and
34 of the boys passed the mock exam. A total of 33 students passed the mock exam. How many girls failed the Chinese mock exam?
| |
Girls |
Boys |
Total |
| Passed the test |
1 u |
3 p |
33 |
| Failed the test |
9 u |
1 p |
63 |
| Total |
10 u |
4 p |
96 |
0.1 of the girls =
110 of the girls
Total number of girls = 10 u
Total number of boys = 4 p
1 u + 3 p = 33 --- (1)
9 u + 1 p = 96 - 33
9 u + 1 p = 63 --- (2)
Make u the same.
(1)
x99 u + 27 p = 297 --- (3)
(3) - (2)
27 p - 1 p = 297 - 63
26 p = 234
1 p = 234 ÷ 26 = 9
From (2)
Number of girls who failed
= 63 - 1 p
= 63 - 9
= 54
Answer(s): 54
