In a row of boys, Rahul is 19th from top and Ajay is 21st from bottom. They interchange their position. Ajay now becomes 28th from bottom. How many total boys are there in the row?
Rahul's position from top = 19th
When Ajay goes to Rahul's position, Ajay's new position = 28th from bottom = Rahul's original position
=> Total number of boys = $$(19+28)-1=46$$
=> Ans - (B)
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