SSC CHSL 7 Mar 2018 Shift 1 Paper

Aruna is sitting at first position (say from left end) of the row.
There are 8 girls between Aruna and Bimla, ⇒ Bimla is sitting at 10th position.
Now, there are 14 girls after Chetna, for number of girls to be minimum, Chetna must sit to the left of Bimla,
⇒ Chetna's position = 4th from left end
∵ There are 14 more girls, thus minimum number of girls = 4 + 14 = 18