The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown in the following figure. How would this paper look when when unfolded?
Since Nithya and Suganya exchange places, so Rita’s new position is the same as Monika’s earlier position. This position is 17th from the right and 10th from the left. Therefore Number of girls in the row = (16 + 1 + 9) = 26.