In a row of boys,Kapil is 8^{th} from the rig | vedclass

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(B) Let the total number of boys be $N$.Initially,Kapil is $8^{th}$ from the right and Nikunj is $12^{th}$ from the left.After interchanging positions

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$17^{th}$

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(B) Let the total number of boys be $N$.Initially,Kapil is $8^{th}$ from the right and Nikunj is $12^{th}$ from the left.After interchanging positions,Nikunj is at the position previously held by Kapil,which is $21^{st}$ from the left.Since this position is $8^{th}$ from the right,the total number of boys $N = (	ext{Position from left} + 	ext{Position from right} - 1) = (21 + 8 - 1) = 28$.Now,Kapil is at the position previously held by Nikunj,which is $12^{th}$ from the left.Kapil's position from the right = $(N - 	ext{Position from left} + 1) = (28 - 12 + 1) = 17^{th}$.

In a row of boys,Kapil is $8^{th}$ from the right and Nikunj is $12^{th}$ from the left. When Kapil and Nikunj interchange positions,Nikunj becomes $21^{st}$ from the left. Which of the following will be Kapil's position from the right?

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