In one Chinese class of 98 pupils, 0.1 of the girls and
34 of the boys passed the test. A total of 41 pupils passed the test. How many girls failed the Chinese test?
| |
Girls |
Boys |
Total |
| Passed the test |
1 u |
3 p |
41 |
| Failed the test |
9 u |
1 p |
57 |
| Total |
10 u |
4 p |
98 |
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 = 41 --- (1)
9 u + 1 p = 98 - 41
9 u + 1 p = 57 --- (2)
Make u the same.
(1)
x99 u + 27 p = 369 --- (3)
(3) - (2)
27 p - 1 p = 369 - 57
26 p = 312
1 p = 312 ÷ 26 = 12
From (2)
Number of girls who failed
= 57 - 1 p
= 57 - 12
= 45
Answer(s): 45
