In a college, 45% of the students are boys. If 40% of the boys and 20% of the girls went on a picnic, what percentage of the total students went to the picnic?

A 18%

B 24%

C 29

D 30%

Correct Answer: Option C

boys =45% so,girls=100-45=55%

boys went to picnic=40% of 45 %=18% girls went to picnic=55% of 20%=11% total student=(18+11)=29%