There are twice as many girls as boys in a class. If 45% of the girls and 30% of the boys have submitted thier consent for the outstation tour, then what percent of the students have NOT submitted consent for the tour?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 60%.
Let number of boys = x, so number of girls = 2x
Total students = x + 2x = 3x
Girls who submitted consent = 45% of 2x = 0.9x
Boys who submitted consent = 30% of x = 0.3x
Total submitted = 0.9x + 0.3x = 1.2x
Total students = 3x
Students who did NOT submit = 3x − 1.2x = 1.8x
Percentage not submitted = (1.8x/3x) × 100 = 60%