In a row of girls, Mardula is 18th from the right and Sanjana is 18th from the left.

Monjur Alahi

In a row of girls, Mardula is 18th from the right and Sanjana is 18th from the left. If both of them exchange their position, Sanjana becomes 25th from the left, how many girls are there in the row? 

(A) 40 

(B) 41 

(C) 42 

(D) 35


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Salim Ahmed Kawsar

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(C) Sanjana’s new position is 25th from left. But it is the some as Mrudula’s earlier position which is 18th from the right. then the total number of girls are = (rank from left + rank from right - 1)

= (18 + 25) - 1 = 43 - 1 = 42.

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