There are twice as many girls as boys in a class. If 45% of the girls and 30% of the boys have submitted their consent for the outstation tour, then what per cent of the students have NOT submitted consent for the tour?

Let the number of boys in the class be 100.
Since there are twice as many girls as boys, the number of girls is:

Girls=2×100=200
Total Students=100+200=300
Step 1: Calculate the percentage of students who did NOT give consent

For girls: 45% submitted consent, which means 100%−45%=55% did NOT submit consent.

Girls without consent=55% of 200=0.55×200=110
For boys: 30% submitted consent, which means 100%−30%=70% did NOT submit consent.

Boys without consent=70% of 100=70
Step 2: Total number of students who did not give consent

Total without consent=110+70=180
Step 3: Calculate the overall percentage

Percentage=(
300
180
​
)×100%=60%