In a class of 60 students where girls are twice that of boys, Laxmi ranked 27th from the top. If there are 9 boys ahead of Laxmi, how many girls are after her rank ?
Answer: C
Given number of girls are twice that of boys.
\small \Rightarrow G=2B and G+B = 60
\small \Rightarrow G=40 and B= 20
Given Laxmi ranked 27th from the top and 9 boys are ahead of Laxmi.
\small \therefore There are 17 girls ahead of Laxmi.
\small \therefore Number of girls who ranked after Laxmi = 40 - (17+1) = 22.