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

If total student is 100

Then, boys are 45

and girls are 55

Now,

40% of 45 boys is = 40*45/100

= 18

And,

20% of girls is = 20*55/100

= 11

Thus, Total = 18 + 11 = 29 students went on the picnic