In a row of girls, Raveena is fifteenth from the left and Mohini is eighteenth from the right. If they interchange their positions, then Mohini will be fifteenth from the left. How many girls are there in that row ?
The formula for the total number of girls is total girls = girls to the left of girl on the left + girls to the right of the girl on the right + girls in between both the girls. The information provided is insufficient as it doesn't mention as to how many girls are there between Mohini and Raveena.
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