Question

If two-ninth of the teachers who teach Physics are female, then the number of male Physics teachers is approximately what percentage of the total number of teachers who teach Chemistry?

• A. 57
• B. 42
• C. 63
• D. 69
• E. 51

Answer 1

The correct option is A 57

Number of male teachers who teach Physics $=\frac{7}{9}\times 1800\times \frac{17}{100}=238$
Total number of teachers who teach Chemistry $=1800\times \frac{23}{100}=414$
$\therefore$ Required percentage
$=\frac{238}{414}\times 100=57\%$