There were 21 more pupils in Group E than in Group F. If 9 pupils transferred from Group E to Group F, how many more pupils would be in Group E than in Group F?
| |
Group E |
Group F |
|
| Before |
1 u + 21 |
1 u |
|
| Change |
- 9 |
+ 9 |
|
| After |
1 u + 12 |
1 u + 9 |
|
Number of pupils that Group E had after transferring to Group F
= 1 u + 21 - 9
= 1 u + 12
Number of pupils that Group F had after the transfer
= 1 u + 9
Number of pupils in Group E more than in Group F
= 12 - 9
= 3
Answer(s): 3
