In one Chinese class of 103 students, 0.25 of the boys and
23 of the girls passed the test. A total of 37 students passed the test. How many boys failed the Chinese test?
| |
Boys |
Girls |
Total |
| Passed the test |
1 u |
2 p |
37 |
| Failed the test |
3 u |
1 p |
66 |
| Total |
4 u |
3 p |
103 |
0.25 of the boys =
14 of the boys
Total number of boys = 4 u
Total number of girls = 3 p
1 u + 2 p = 37 --- (1)
3 u + 1 p = 103 - 37
3 u + 1 p = 66 --- (2)
Make u the same.
(1)
x33 u + 6 p = 111 --- (3)
(3) - (2)
6 p - 1 p = 111 - 66
5 p = 45
1 p = 45 ÷ 5 = 9
From (2)
Number of boys who failed
= 66 - 1 p
= 66 - 9
= 57
Answer(s): 57
