A certain school has 300 students, 142 of whom are boys. It has 30 teachers, 12 of whom are men. What percent of the total number of students and teaachers in the school is female?
Number of students in school = 300
Number of boys = 142
∴ Number of girls = 300 – 142 = 158
Number of teachers in school = 30
No. of male teachers = 12
∴ No. of female teachers = 30 – 12 = 18
Total no. of students and teachers = 300+30 = 330
Total numbers of females = 158+18 = 176
Percentage of females in school =