Sunil's position from the left in a row of boys is 20th and Deepak's position from the right is 36th. After interchanging their position, Sunil becomes 28th from the left. How many boys are there in the row?
Deepak's initial position = 36th from right and Sunil final position = 28th from left
Also, after interchanging Deepak's initial position = Sunil's final position
Thus, number of boys = $$(36+28)-1=63$$
=> Ans - (B)
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