The table shows employees in four colleges A to D, split into males, females, teaching and non-teaching. Dashes are missing values to be calculated if required.
| College | Employees | Males | Females | Teaching Males | Teaching Females | Non-teaching Males | Non-teaching Females |
|---|---|---|---|---|---|---|---|
| A | 756 | 526 | — | 325 | — | — | — |
| B | — | — | — | — | 159 | 215 | 254 |
| C | — | 159 | — | — | — | — | — |
| D | 224 | 142 | 82 | — | — | — | — |
In College A, if the number of non-teaching females is 2 more than half the number of teaching females, then the difference between non-teaching males and non-teaching females is
A130
B123 ✓ Correct
C120
D118
Correct answer: (B) 123
Explanation
The difference is 123, so the answer is 123.
College A has 756 employees and 526 males, so it has 230 females.
The females split into teaching and non-teaching females.
Let the teaching females be x, so the non-teaching females are x by 2 plus 2.
Then x plus x by 2 plus 2 equals 230, which gives x equal to 152 teaching females.
So the non-teaching females are 152 by 2 plus 2, which is 78, and non-teaching males are 201.
The difference is 201 minus 78, which is 123.
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