Tere is collecting survey information on his class.
2/3 of the students in his class are male and 1/3 are female. 1/6 of his class are left handed.
If there are 4 left handed students in the class and they are all male, how many right handed males are there in the class?
Solution:
You can solve this by making a table:
| Male | Female | |
| Right handed | ||
| Left handed |
Enter the information you know:
| Male (2/3) | Female (1/3) | |
| Right handed (5/6) | ||
| Left handed (1/6) | 4 | 0 |
There are 4 left handed students and this is 1/6 of the total, so there must be a total of 24 students (4 x 6).
Of those 24 students 1/3 are female, so there are 8 females, all of whom are right handed.
| Male (2/3) | Female (1/3) | |
| Right handed (5/6) | 8 | |
| Left handed (1/6) | 4 | 0 |
The only category left to complete is right handed males, so the remaining 12 students must be right handed males.
| Male (2/3) | Female (1/3) | |
| Right handed (5/6) | 12 | 8 |
| Left handed (1/6) | 4 | 0 |